diff --git a/_mirror b/_mirror
index 5daf19e..be43196 160000
--- a/_mirror
+++ b/_mirror
@@ -1 +1 @@
-Subproject commit 5daf19e6b5579dfba7d5bc83d4b2c7db02e4c3a0
+Subproject commit be43196a3d33412a5dbad92983af7e149b1b066d
diff --git a/engine/art/audio/coin.wav b/engine/art/audio/coin.wav
deleted file mode 100644
index b0ca3e8..0000000
Binary files a/engine/art/audio/coin.wav and /dev/null differ
diff --git a/engine/art/audio/larry.mid b/engine/art/audio/larry.mid
deleted file mode 100644
index 3b886aa..0000000
Binary files a/engine/art/audio/larry.mid and /dev/null differ
diff --git a/engine/art/audio/larry.txt b/engine/art/audio/larry.txt
deleted file mode 100644
index 63987f6..0000000
--- a/engine/art/audio/larry.txt
+++ /dev/null
@@ -1,38 +0,0 @@
-                         SIERRA ON-LINE, INC.
-            3-D Animated Adventure Game Soundtrack Series
-           ===============================================
-              LEISURE SUIT LARRY III: PASSIONATE PATTI-   
-                IN PURSUIT OF THE PULSATING PECTORALS     
-                                                          
-
-                         "TAWNI AT THE BEACH"
-                               Mike Dana                
-           ===============================================
-               Copyright (c)1989 Sierra On-Line, Inc.     
-           ===============================================
-
-                          GENERAL MIDI VERSION
-
-System Requirements:
-
-- MIDI Playback Software capable of reading Type 1 Standard
-    MIDI File format 
-- General MIDI sound device  (Wave Table or better recommended)
-
-
-This Standard MIDI File was recorded directly from Sierra's "Leisure Suit
-Larry 3" adventure game.  It has been converted from the MT-32 version for
-playback on General MIDI sound cards.  A Wave Table or better sound card is
-highly recommended for optimal playback.
-
-Recorded/converted for General MIDI by Tom Lewandowski.
-Address questions or comments to:
-
-     QUEST STUDIOS
-     Tom Lewandowski
-     tom@queststudios.com
-
-     www.QuestStudios.com
-
-
-
diff --git a/engine/art/audio/monkey1.mid b/engine/art/audio/monkey1.mid
deleted file mode 100644
index aef79ef..0000000
Binary files a/engine/art/audio/monkey1.mid and /dev/null differ
diff --git a/engine/art/audio/monkey1.txt b/engine/art/audio/monkey1.txt
deleted file mode 100644
index e3f8294..0000000
--- a/engine/art/audio/monkey1.txt
+++ /dev/null
@@ -1,43 +0,0 @@
-                             QUEST STUDIOS
-                       SOFTWARE SOUNDTRACK SERIES
-          ====================================================
-                      THE SECRET OF MONKEY ISLAND   
-
-
-                      "INTRODUCTION/OPENING THEMES"
-                            Michael Z. Land
-          ====================================================
-              Copyright (c)1989 LucasArts Entertainment Co.
-          ====================================================
-
-                G E N E R A L   M I D I   V E R S I O N
-
-
-
-System Requirements:
-
-- MIDI Playback Software capable of reading Type 1 Standard
-    MIDI File format
-- General MIDI sound device  (Wave Table recommended.)
-
-
-This Standard MIDI File was recorded directly from LucasFilm Game's
-"The Secret of Monkey Island" adventure game.  It has been converted
-from the MT-32 version for playback on General MIDI sound cards.  A
-Wave Table sound card is highly recommended for optimal playback.
-
-Recorded/Converted to Standard MIDI File format by Tom Lewandowski.
-Address questions or comments to:
-
-     QUEST STUDIOS
-     Tom Lewandowski
-     tom+di@netnet.net
-
-
-
-     THE ROLAND MT-32 SOUND MODULE RESOURCE CENTER
-     THE SIERRA SOUNDTRACK SERIES/SOFTWARE SOUNDTRACK SERIES
-     http://bayland.net/~tom+di/sierra/roland.html
-
-
-                           
diff --git a/engine/art/audio/pew.sfxr b/engine/art/audio/pew.sfxr
deleted file mode 100644
index 4689701..0000000
Binary files a/engine/art/audio/pew.sfxr and /dev/null differ
diff --git a/engine/art/audio/waterworld-map.fur b/engine/art/audio/waterworld-map.fur
deleted file mode 100644
index 2bf8a7a..0000000
Binary files a/engine/art/audio/waterworld-map.fur and /dev/null differ
diff --git a/engine/art/audio/wrath_of_the_djinn.txt b/engine/art/audio/wrath_of_the_djinn.txt
deleted file mode 100644
index b359515..0000000
--- a/engine/art/audio/wrath_of_the_djinn.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-Licensed under the Public Domain license
-Registered Artist(s):
- Drozerix
diff --git a/engine/art/audio/wrath_of_the_djinn.xm b/engine/art/audio/wrath_of_the_djinn.xm
deleted file mode 100644
index 84c16b0..0000000
Binary files a/engine/art/audio/wrath_of_the_djinn.xm and /dev/null differ
diff --git a/engine/joint/v4k.h b/engine/joint/v4k.h
index f886324..3cc65d0 100644
--- a/engine/joint/v4k.h
+++ b/engine/joint/v4k.h
@@ -14757,7 +14757,7 @@ API void  (map_clear)(map* m);
 API char *cc4str(unsigned cc);
 API char *cc8str(uint64_t cc);
 
-enum { ///-
+enum {
 #   define _(a,b,c,d,e) cc__##a, cc__##b, cc__##c, cc__##d, cc__##e
     cc__1 = '1', _(2,3,4,5,6),_(7,8,9,0,_), cc__ = ' ',
     cc__A = 'A', _(B,C,D,E,F),_(G,H,I,J,K),_(L,M,N,O,P),_(Q,R,S,T,U),_(V,W,X,Y,Z),
@@ -253747,8 +253747,9 @@ int dir_yield(dir *d, const char *pathfile, char *name, int namelen) {
     snprintf(name, namelen, "%s/*", pathfile);
     for( HANDLE h = FindFirstFileA(name, &fdata ); h != INVALID_HANDLE_VALUE; ok = (FindClose( h ), h = INVALID_HANDLE_VALUE, 1)) {
         for( int next = 1; next; next = FindNextFileA(h, &fdata) != 0 ) {
-            if( fdata.cFileName[0] == '.' ) continue;
             int is_dir = (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) > 0;
+            if( is_dir && fdata.cFileName[0] == '.' ) continue;
+
             snprintf(name, namelen, "%s/%s%s", pathfile, fdata.cFileName, is_dir ? "/" : "");
             struct stat st; if( !is_dir ) if(stat(name, &st) < 0) continue;
             // add
@@ -253763,10 +253764,11 @@ int dir_yield(dir *d, const char *pathfile, char *name, int namelen) {
     snprintf(name, namelen, "%s/", pathfile);
     for( DIR *dir = opendir(name); dir; ok = (closedir(dir), dir = 0, 1)) {
         for( struct dirent *ep; (ep = readdir(dir)) != NULL; ) {
-            if( ep->d_name[0] == '.' ) continue;
             snprintf(name, namelen, "%s/%s", pathfile, ep->d_name);
             struct stat st; if( stat(name, &st) < 0 ) continue;
-            DIR *tmp = opendir(/*ep->d_*/name); int is_dir = !!tmp; if(tmp) closedir(tmp);
+            DIR *tmp = opendir(/*ep->d_*/name); int is_dir = !!tmp; if(tmp) closedir(tmp); // @todo:optimizeme (maybe use stat instead)
+            if( is_dir && ep->d_name[0] == '.' ) continue;
+
             // add
             dir_entry de = { STRDUP(name), is_dir ? 0 : st.st_size, is_dir };
             d->entry = (dir_entry*)REALLOC(d->entry, ++d->count * sizeof(dir_entry));
@@ -586455,7 +586457,6 @@ int cook_jobs() {
     return clampi(num_jobs, 0, cook_disabled?0:max_jobs);
 }
 
-
 void cook_config( const char *pathfile_to_cook_ini ) { // @todo: test run-from-"bin/" case on Linux.
     COOK_INI = pathfile_to_cook_ini;
     ASSERT( file_exist(COOK_INI) );
@@ -587012,36 +587013,30 @@ const char** file_list(const char *cwd, const char *masks) {
     }
     array_resize(list, 0);//array_free(list);
 
-    for each_substring(masks,";",it) {
-        int recurse = !!strstr(it, "**");
-        #if is(win32)
-        char *glob = va("dir %s/b/o:n \"%s\\%s\" 2> NUL", recurse ? "/s":"", cwd, it);
-        #else // linux, osx
-        char *glob = va("find %s %s -name \"%s\" | sort", cwd, !recurse ? "-maxdepth 1":"-type f", it);
-        #endif
-        for( FILE *in = popen(glob, "r"); in; pclose(in), in = 0) {
-            char buf[1024], *line = buf;
-            while( fgets(buf, sizeof(buf), in) ) {
-                // clean up
-                if( strstr(line, arg0) ) line = buf + larg0;
-                if( !memcmp(line, "./", 2) ) line += 2;
-                int len = strlen(line); while( len > 0 && line[len-1] < 32 ) line[--len] = 0;
-                if( line[0] == '\0' ) continue;
-                // do not insert system folders/files
-                for(int i = 0; i < len; ++i ) if(line[i] == '\\') line[i] = '/';
-                if( line[0] == '.' ) if( !strcmp(line,".git") || !strcmp(line,".vs") || !strcmp(line,".") || !strcmp(line,"..") ) continue;
-                if( strstr(line, "/.") ) continue;
+    dir *d = dir_open(cwd, "rb");
+    if( d ) {
+        for( int i = 0; i < dir_count(d); ++i ) {
+            if( dir_file(d,i) ) {
+                // dir_name() should return full normalized paths "C:/prj/v4k/demos/art/fx/fxBloom.fs". should exclude system dirs as well
+                char *entry = dir_name(d,i);
+                char *fname = file_name(entry);
+
+                int allowed = 0;
+                for each_substring(masks,";",mask) {
+                    allowed |= strmatch(fname, mask);
+                }
+                if( !allowed ) continue;
+
+                // if( strstr(fname, "/.") ) continue; // @fixme: still needed? useful?
+
                 // insert copy
-                #if is(win32)
-                char *copy = STRDUP(line); // full path already provided
-                #else
-                // while(line[0] == '/') ++line;
-                char *copy = STRDUP(va("%s%s", cwd, line)); // need to prepend path
-                #endif
+                char *copy = STRDUP(entry);
                 array_push(list, copy);
             }
         }
+        dir_close(d);
     }
+
     array_push(list, 0); // terminator
     return (const char**)list;
 }
@@ -587578,12 +587573,14 @@ if( found && *found == 0 ) {
     base = file_name(pathfile);
     if(base[0] == '\0') return 0; // it's a dir
     folder = file_path(pathfile);
-        // make folder variable easier to read in logs: /home/rlyeh/prj/v4k/art/demos/audio/coin.wav -> demos/audio/coin.wav 
-        // static int ART_LEN = 0; do_once ART_LEN = strlen(ART);
-        // if( !strncmp(folder, ART, ART_LEN) ) {
-        //     folder += ART_LEN;
-        // }
-        char* pretty_folder = folder && strlen(folder) >= ART_LEN ? folder + ART_LEN : "";
+        // ease folders reading by shortening them: /home/rlyeh/prj/v4k/art/demos/audio/coin.wav -> demos/audio/coin.wav
+        // or C:/prj/v4k/engine/art/fonts/B612-BoldItalic.ttf -> fonts/B612-BoldItalic.ttf
+        static array(char*) art_paths = 0;
+        do_once for each_substring(ART,",",stem) array_push(art_paths, STRDUP(stem));
+        char* pretty_folder = "";
+        if( folder ) for( int i = 0; i < array_count(art_paths); ++i ) {
+            if( strbeg(folder, art_paths[i]) ) { pretty_folder = folder + strlen(art_paths[i]); break; }
+        }
     //}
 
     int size = 0;
@@ -591809,7 +591806,7 @@ bool invert44(mat44 T, const mat44 M) { // !!! ok, i guess
 }
 
 vec4 transform444(const mat44, const vec4);
-bool unproject44(vec3 *out, vec3 xyd, vec4 viewport, mat44 mvp) {
+bool unproject44(vec3 *out, vec3 xyd, vec4 viewport, mat44 mvp) { // @fixme: this function is broken (verified by @zpl-zak)
     // xyd: usually x:mouse_x,y:window_height()-mouse_y,d:0=znear/1=zfar
     // src: https://www.khronos.org/opengl/wiki/GluProject_and_gluUnProject_code
     mat44 inv_mvp;
@@ -600273,7 +600270,7 @@ void camera_fov(camera_t *cam, float fov) {
 
     float DIMETRIC = 30.000f;
     float ISOMETRIC = 35.264f;
-    float aspect = window_width() / ((float)window_height()+!!window_height());
+    float aspect = window_width() / ((float)window_height()+!window_height());
     orthogonal(cam->proj, 45, aspect, -1000, 1000); // why -1000?
     // cam->yaw = 45;
     cam->pitch = -ISOMETRIC;
@@ -601991,7 +601988,7 @@ bool app_open_folder(const char *file) {
 #ifdef _WIN32
     snprintf(buf, sizeof(buf), "start \"\" \"%s\"", file);
 #elif __APPLE__
-    snprintf(buf, sizeof(buf), "%s \"%s\"", is_directory(file) ? "open" : "open --reveal", file);
+    snprintf(buf, sizeof(buf), "%s \"%s\"", file_directory(file) ? "open" : "open --reveal", file);
 #else
     snprintf(buf, sizeof(buf), "xdg-open \"%s\"", file);
 #endif
@@ -606805,6 +606802,14 @@ char *editor_path(const char *path) {
 }
 
 vec3 editor_pick(float mouse_x, float mouse_y) {
+#if 0
+    // unproject 2d coord as 3d coord
+    camera_t *camera = camera_get_active();
+    vec3 out, xyd = vec3(mouse_x,window_height()-mouse_y,1); // usually x:mouse_x,y:window_height()-mouse_y,d:0=znear/1=zfar
+    mat44 mvp, model; identity44(model); multiply44x3(mvp, camera->proj, camera->view, model);
+    bool ok = unproject44(&out, xyd, vec4(0,0,window_width(),window_height()), mvp);
+    return out;
+#else
     // unproject 2d coord as 3d coord
     camera_t *camera = camera_get_active();
     float x = (2.0f * mouse_x) / window_width() - 1.0f;
@@ -606818,6 +606823,7 @@ vec3 editor_pick(float mouse_x, float mouse_y) {
     vec4 eye = vec4(p.x, p.y, -1.0, 0.0);
     vec4 wld = norm4(transform444(inv_view, eye));
     return vec3(wld.x, wld.y, wld.z);
+#endif
 }
 
 int editor_ui_bits8(const char *label, uint8_t *enabled) { // @to deprecate
diff --git a/engine/split/3rd_archive.h b/engine/split/3rd_archive.h
index 4d808a3..6f3fd2a 100644
--- a/engine/split/3rd_archive.h
+++ b/engine/split/3rd_archive.h
@@ -1471,8 +1471,9 @@ int dir_yield(dir *d, const char *pathfile, char *name, int namelen) {
     snprintf(name, namelen, "%s/*", pathfile);
     for( HANDLE h = FindFirstFileA(name, &fdata ); h != INVALID_HANDLE_VALUE; ok = (FindClose( h ), h = INVALID_HANDLE_VALUE, 1)) {
         for( int next = 1; next; next = FindNextFileA(h, &fdata) != 0 ) {
-            if( fdata.cFileName[0] == '.' ) continue;
             int is_dir = (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) > 0;
+            if( is_dir && fdata.cFileName[0] == '.' ) continue;
+
             snprintf(name, namelen, "%s/%s%s", pathfile, fdata.cFileName, is_dir ? "/" : "");
             struct stat st; if( !is_dir ) if(stat(name, &st) < 0) continue;
             // add
@@ -1487,10 +1488,11 @@ int dir_yield(dir *d, const char *pathfile, char *name, int namelen) {
     snprintf(name, namelen, "%s/", pathfile);
     for( DIR *dir = opendir(name); dir; ok = (closedir(dir), dir = 0, 1)) {
         for( struct dirent *ep; (ep = readdir(dir)) != NULL; ) {
-            if( ep->d_name[0] == '.' ) continue;
             snprintf(name, namelen, "%s/%s", pathfile, ep->d_name);
             struct stat st; if( stat(name, &st) < 0 ) continue;
-            DIR *tmp = opendir(/*ep->d_*/name); int is_dir = !!tmp; if(tmp) closedir(tmp);
+            DIR *tmp = opendir(/*ep->d_*/name); int is_dir = !!tmp; if(tmp) closedir(tmp); // @todo:optimizeme (maybe use stat instead)
+            if( is_dir && ep->d_name[0] == '.' ) continue;
+
             // add
             dir_entry de = { STRDUP(name), is_dir ? 0 : st.st_size, is_dir };
             d->entry = (dir_entry*)REALLOC(d->entry, ++d->count * sizeof(dir_entry));
diff --git a/engine/split/v4k_cooker.c b/engine/split/v4k_cooker.c
index 26d7f7e..c56d921 100644
--- a/engine/split/v4k_cooker.c
+++ b/engine/split/v4k_cooker.c
@@ -817,7 +817,6 @@ int cook_jobs() {
     return clampi(num_jobs, 0, cook_disabled?0:max_jobs);
 }
 
-
 void cook_config( const char *pathfile_to_cook_ini ) { // @todo: test run-from-"bin/" case on Linux.
     COOK_INI = pathfile_to_cook_ini;
     ASSERT( file_exist(COOK_INI) );
diff --git a/engine/split/v4k_ds.h b/engine/split/v4k_ds.h
index dbcb47d..03b53d1 100644
--- a/engine/split/v4k_ds.h
+++ b/engine/split/v4k_ds.h
@@ -433,7 +433,7 @@ API void  (map_clear)(map* m);
 API char *cc4str(unsigned cc);
 API char *cc8str(uint64_t cc);
 
-enum { ///-
+enum {
 #   define _(a,b,c,d,e) cc__##a, cc__##b, cc__##c, cc__##d, cc__##e
     cc__1 = '1', _(2,3,4,5,6),_(7,8,9,0,_), cc__ = ' ',
     cc__A = 'A', _(B,C,D,E,F),_(G,H,I,J,K),_(L,M,N,O,P),_(Q,R,S,T,U),_(V,W,X,Y,Z),
diff --git a/engine/split/v4k_editor.c b/engine/split/v4k_editor.c
index 300b202..5cb221b 100644
--- a/engine/split/v4k_editor.c
+++ b/engine/split/v4k_editor.c
@@ -6,6 +6,14 @@ char *editor_path(const char *path) {
 }
 
 vec3 editor_pick(float mouse_x, float mouse_y) {
+#if 0
+    // unproject 2d coord as 3d coord
+    camera_t *camera = camera_get_active();
+    vec3 out, xyd = vec3(mouse_x,window_height()-mouse_y,1); // usually x:mouse_x,y:window_height()-mouse_y,d:0=znear/1=zfar
+    mat44 mvp, model; identity44(model); multiply44x3(mvp, camera->proj, camera->view, model);
+    bool ok = unproject44(&out, xyd, vec4(0,0,window_width(),window_height()), mvp);
+    return out;
+#else
     // unproject 2d coord as 3d coord
     camera_t *camera = camera_get_active();
     float x = (2.0f * mouse_x) / window_width() - 1.0f;
@@ -19,6 +27,7 @@ vec3 editor_pick(float mouse_x, float mouse_y) {
     vec4 eye = vec4(p.x, p.y, -1.0, 0.0);
     vec4 wld = norm4(transform444(inv_view, eye));
     return vec3(wld.x, wld.y, wld.z);
+#endif
 }
 
 int editor_ui_bits8(const char *label, uint8_t *enabled) { // @to deprecate
diff --git a/engine/split/v4k_file.c b/engine/split/v4k_file.c
index 48d8b39..47d45b4 100644
--- a/engine/split/v4k_file.c
+++ b/engine/split/v4k_file.c
@@ -212,36 +212,30 @@ const char** file_list(const char *cwd, const char *masks) {
     }
     array_resize(list, 0);//array_free(list);
 
-    for each_substring(masks,";",it) {
-        int recurse = !!strstr(it, "**");
-        #if is(win32)
-        char *glob = va("dir %s/b/o:n \"%s\\%s\" 2> NUL", recurse ? "/s":"", cwd, it);
-        #else // linux, osx
-        char *glob = va("find %s %s -name \"%s\" | sort", cwd, !recurse ? "-maxdepth 1":"-type f", it);
-        #endif
-        for( FILE *in = popen(glob, "r"); in; pclose(in), in = 0) {
-            char buf[1024], *line = buf;
-            while( fgets(buf, sizeof(buf), in) ) {
-                // clean up
-                if( strstr(line, arg0) ) line = buf + larg0;
-                if( !memcmp(line, "./", 2) ) line += 2;
-                int len = strlen(line); while( len > 0 && line[len-1] < 32 ) line[--len] = 0;
-                if( line[0] == '\0' ) continue;
-                // do not insert system folders/files
-                for(int i = 0; i < len; ++i ) if(line[i] == '\\') line[i] = '/';
-                if( line[0] == '.' ) if( !strcmp(line,".git") || !strcmp(line,".vs") || !strcmp(line,".") || !strcmp(line,"..") ) continue;
-                if( strstr(line, "/.") ) continue;
+    dir *d = dir_open(cwd, "rb");
+    if( d ) {
+        for( int i = 0; i < dir_count(d); ++i ) {
+            if( dir_file(d,i) ) {
+                // dir_name() should return full normalized paths "C:/prj/v4k/demos/art/fx/fxBloom.fs". should exclude system dirs as well
+                char *entry = dir_name(d,i);
+                char *fname = file_name(entry);
+
+                int allowed = 0;
+                for each_substring(masks,";",mask) {
+                    allowed |= strmatch(fname, mask);
+                }
+                if( !allowed ) continue;
+
+                // if( strstr(fname, "/.") ) continue; // @fixme: still needed? useful?
+
                 // insert copy
-                #if is(win32)
-                char *copy = STRDUP(line); // full path already provided
-                #else
-                // while(line[0] == '/') ++line;
-                char *copy = STRDUP(va("%s%s", cwd, line)); // need to prepend path
-                #endif
+                char *copy = STRDUP(entry);
                 array_push(list, copy);
             }
         }
+        dir_close(d);
     }
+
     array_push(list, 0); // terminator
     return (const char**)list;
 }
@@ -778,12 +772,14 @@ if( found && *found == 0 ) {
     base = file_name(pathfile);
     if(base[0] == '\0') return 0; // it's a dir
     folder = file_path(pathfile);
-        // make folder variable easier to read in logs: /home/rlyeh/prj/v4k/art/demos/audio/coin.wav -> demos/audio/coin.wav 
-        // static int ART_LEN = 0; do_once ART_LEN = strlen(ART);
-        // if( !strncmp(folder, ART, ART_LEN) ) {
-        //     folder += ART_LEN;
-        // }
-        char* pretty_folder = folder && strlen(folder) >= ART_LEN ? folder + ART_LEN : "";
+        // ease folders reading by shortening them: /home/rlyeh/prj/v4k/art/demos/audio/coin.wav -> demos/audio/coin.wav
+        // or C:/prj/v4k/engine/art/fonts/B612-BoldItalic.ttf -> fonts/B612-BoldItalic.ttf
+        static array(char*) art_paths = 0;
+        do_once for each_substring(ART,",",stem) array_push(art_paths, STRDUP(stem));
+        char* pretty_folder = "";
+        if( folder ) for( int i = 0; i < array_count(art_paths); ++i ) {
+            if( strbeg(folder, art_paths[i]) ) { pretty_folder = folder + strlen(art_paths[i]); break; }
+        }
     //}
 
     int size = 0;
diff --git a/engine/split/v4k_math.c b/engine/split/v4k_math.c
index 85ecbc1..bf23946 100644
--- a/engine/split/v4k_math.c
+++ b/engine/split/v4k_math.c
@@ -821,7 +821,7 @@ bool invert44(mat44 T, const mat44 M) { // !!! ok, i guess
 }
 
 vec4 transform444(const mat44, const vec4);
-bool unproject44(vec3 *out, vec3 xyd, vec4 viewport, mat44 mvp) {
+bool unproject44(vec3 *out, vec3 xyd, vec4 viewport, mat44 mvp) { // @fixme: this function is broken (verified by @zpl-zak)
     // xyd: usually x:mouse_x,y:window_height()-mouse_y,d:0=znear/1=zfar
     // src: https://www.khronos.org/opengl/wiki/GluProject_and_gluUnProject_code
     mat44 inv_mvp;
diff --git a/engine/split/v4k_scene.c b/engine/split/v4k_scene.c
index 3c2da04..86dd766 100644
--- a/engine/split/v4k_scene.c
+++ b/engine/split/v4k_scene.c
@@ -109,7 +109,7 @@ void camera_fov(camera_t *cam, float fov) {
 
     float DIMETRIC = 30.000f;
     float ISOMETRIC = 35.264f;
-    float aspect = window_width() / ((float)window_height()+!!window_height());
+    float aspect = window_width() / ((float)window_height()+!window_height());
     orthogonal(cam->proj, 45, aspect, -1000, 1000); // why -1000?
     // cam->yaw = 45;
     cam->pitch = -ISOMETRIC;
diff --git a/engine/split/v4k_system.c b/engine/split/v4k_system.c
index a3cb685..979feff 100644
--- a/engine/split/v4k_system.c
+++ b/engine/split/v4k_system.c
@@ -823,7 +823,7 @@ bool app_open_folder(const char *file) {
 #ifdef _WIN32
     snprintf(buf, sizeof(buf), "start \"\" \"%s\"", file);
 #elif __APPLE__
-    snprintf(buf, sizeof(buf), "%s \"%s\"", is_directory(file) ? "open" : "open --reveal", file);
+    snprintf(buf, sizeof(buf), "%s \"%s\"", file_directory(file) ? "open" : "open --reveal", file);
 #else
     snprintf(buf, sizeof(buf), "xdg-open \"%s\"", file);
 #endif
diff --git a/engine/v4k b/engine/v4k
index e63fd7a..e9dae6e 100644
--- a/engine/v4k
+++ b/engine/v4k
@@ -235686,8 +235686,9 @@ int dir_yield(dir *d, const char *pathfile, char *name, int namelen) {
     snprintf(name, namelen, "%s/*", pathfile);
     for( HANDLE h = FindFirstFileA(name, &fdata ); h != INVALID_HANDLE_VALUE; ok = (FindClose( h ), h = INVALID_HANDLE_VALUE, 1)) {
         for( int next = 1; next; next = FindNextFileA(h, &fdata) != 0 ) {
-            if( fdata.cFileName[0] == '.' ) continue;
             int is_dir = (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) > 0;
+            if( is_dir && fdata.cFileName[0] == '.' ) continue;
+
             snprintf(name, namelen, "%s/%s%s", pathfile, fdata.cFileName, is_dir ? "/" : "");
             struct stat st; if( !is_dir ) if(stat(name, &st) < 0) continue;
             // add
@@ -235702,10 +235703,11 @@ int dir_yield(dir *d, const char *pathfile, char *name, int namelen) {
     snprintf(name, namelen, "%s/", pathfile);
     for( DIR *dir = opendir(name); dir; ok = (closedir(dir), dir = 0, 1)) {
         for( struct dirent *ep; (ep = readdir(dir)) != NULL; ) {
-            if( ep->d_name[0] == '.' ) continue;
             snprintf(name, namelen, "%s/%s", pathfile, ep->d_name);
             struct stat st; if( stat(name, &st) < 0 ) continue;
-            DIR *tmp = opendir(/*ep->d_*/name); int is_dir = !!tmp; if(tmp) closedir(tmp);
+            DIR *tmp = opendir(/*ep->d_*/name); int is_dir = !!tmp; if(tmp) closedir(tmp); // @todo:optimizeme (maybe use stat instead)
+            if( is_dir && ep->d_name[0] == '.' ) continue;
+
             // add
             dir_entry de = { STRDUP(name), is_dir ? 0 : st.st_size, is_dir };
             d->entry = (dir_entry*)REALLOC(d->entry, ++d->count * sizeof(dir_entry));
diff --git a/engine/v4k.c b/engine/v4k.c
index 2440ecb..3cb40b3 100644
--- a/engine/v4k.c
+++ b/engine/v4k.c
@@ -4631,7 +4631,6 @@ int cook_jobs() {
     return clampi(num_jobs, 0, cook_disabled?0:max_jobs);
 }
 
-
 void cook_config( const char *pathfile_to_cook_ini ) { // @todo: test run-from-"bin/" case on Linux.
     COOK_INI = pathfile_to_cook_ini;
     ASSERT( file_exist(COOK_INI) );
@@ -5188,36 +5187,30 @@ const char** file_list(const char *cwd, const char *masks) {
     }
     array_resize(list, 0);//array_free(list);
 
-    for each_substring(masks,";",it) {
-        int recurse = !!strstr(it, "**");
-        #if is(win32)
-        char *glob = va("dir %s/b/o:n \"%s\\%s\" 2> NUL", recurse ? "/s":"", cwd, it);
-        #else // linux, osx
-        char *glob = va("find %s %s -name \"%s\" | sort", cwd, !recurse ? "-maxdepth 1":"-type f", it);
-        #endif
-        for( FILE *in = popen(glob, "r"); in; pclose(in), in = 0) {
-            char buf[1024], *line = buf;
-            while( fgets(buf, sizeof(buf), in) ) {
-                // clean up
-                if( strstr(line, arg0) ) line = buf + larg0;
-                if( !memcmp(line, "./", 2) ) line += 2;
-                int len = strlen(line); while( len > 0 && line[len-1] < 32 ) line[--len] = 0;
-                if( line[0] == '\0' ) continue;
-                // do not insert system folders/files
-                for(int i = 0; i < len; ++i ) if(line[i] == '\\') line[i] = '/';
-                if( line[0] == '.' ) if( !strcmp(line,".git") || !strcmp(line,".vs") || !strcmp(line,".") || !strcmp(line,"..") ) continue;
-                if( strstr(line, "/.") ) continue;
+    dir *d = dir_open(cwd, "rb");
+    if( d ) {
+        for( int i = 0; i < dir_count(d); ++i ) {
+            if( dir_file(d,i) ) {
+                // dir_name() should return full normalized paths "C:/prj/v4k/demos/art/fx/fxBloom.fs". should exclude system dirs as well
+                char *entry = dir_name(d,i);
+                char *fname = file_name(entry);
+
+                int allowed = 0;
+                for each_substring(masks,";",mask) {
+                    allowed |= strmatch(fname, mask);
+                }
+                if( !allowed ) continue;
+
+                // if( strstr(fname, "/.") ) continue; // @fixme: still needed? useful?
+
                 // insert copy
-                #if is(win32)
-                char *copy = STRDUP(line); // full path already provided
-                #else
-                // while(line[0] == '/') ++line;
-                char *copy = STRDUP(va("%s%s", cwd, line)); // need to prepend path
-                #endif
+                char *copy = STRDUP(entry);
                 array_push(list, copy);
             }
         }
+        dir_close(d);
     }
+
     array_push(list, 0); // terminator
     return (const char**)list;
 }
@@ -5754,12 +5747,14 @@ if( found && *found == 0 ) {
     base = file_name(pathfile);
     if(base[0] == '\0') return 0; // it's a dir
     folder = file_path(pathfile);
-        // make folder variable easier to read in logs: /home/rlyeh/prj/v4k/art/demos/audio/coin.wav -> demos/audio/coin.wav 
-        // static int ART_LEN = 0; do_once ART_LEN = strlen(ART);
-        // if( !strncmp(folder, ART, ART_LEN) ) {
-        //     folder += ART_LEN;
-        // }
-        char* pretty_folder = folder && strlen(folder) >= ART_LEN ? folder + ART_LEN : "";
+        // ease folders reading by shortening them: /home/rlyeh/prj/v4k/art/demos/audio/coin.wav -> demos/audio/coin.wav
+        // or C:/prj/v4k/engine/art/fonts/B612-BoldItalic.ttf -> fonts/B612-BoldItalic.ttf
+        static array(char*) art_paths = 0;
+        do_once for each_substring(ART,",",stem) array_push(art_paths, STRDUP(stem));
+        char* pretty_folder = "";
+        if( folder ) for( int i = 0; i < array_count(art_paths); ++i ) {
+            if( strbeg(folder, art_paths[i]) ) { pretty_folder = folder + strlen(art_paths[i]); break; }
+        }
     //}
 
     int size = 0;
@@ -9985,7 +9980,7 @@ bool invert44(mat44 T, const mat44 M) { // !!! ok, i guess
 }
 
 vec4 transform444(const mat44, const vec4);
-bool unproject44(vec3 *out, vec3 xyd, vec4 viewport, mat44 mvp) {
+bool unproject44(vec3 *out, vec3 xyd, vec4 viewport, mat44 mvp) { // @fixme: this function is broken (verified by @zpl-zak)
     // xyd: usually x:mouse_x,y:window_height()-mouse_y,d:0=znear/1=zfar
     // src: https://www.khronos.org/opengl/wiki/GluProject_and_gluUnProject_code
     mat44 inv_mvp;
@@ -18449,7 +18444,7 @@ void camera_fov(camera_t *cam, float fov) {
 
     float DIMETRIC = 30.000f;
     float ISOMETRIC = 35.264f;
-    float aspect = window_width() / ((float)window_height()+!!window_height());
+    float aspect = window_width() / ((float)window_height()+!window_height());
     orthogonal(cam->proj, 45, aspect, -1000, 1000); // why -1000?
     // cam->yaw = 45;
     cam->pitch = -ISOMETRIC;
@@ -20167,7 +20162,7 @@ bool app_open_folder(const char *file) {
 #ifdef _WIN32
     snprintf(buf, sizeof(buf), "start \"\" \"%s\"", file);
 #elif __APPLE__
-    snprintf(buf, sizeof(buf), "%s \"%s\"", is_directory(file) ? "open" : "open --reveal", file);
+    snprintf(buf, sizeof(buf), "%s \"%s\"", file_directory(file) ? "open" : "open --reveal", file);
 #else
     snprintf(buf, sizeof(buf), "xdg-open \"%s\"", file);
 #endif
@@ -24981,6 +24976,14 @@ char *editor_path(const char *path) {
 }
 
 vec3 editor_pick(float mouse_x, float mouse_y) {
+#if 0
+    // unproject 2d coord as 3d coord
+    camera_t *camera = camera_get_active();
+    vec3 out, xyd = vec3(mouse_x,window_height()-mouse_y,1); // usually x:mouse_x,y:window_height()-mouse_y,d:0=znear/1=zfar
+    mat44 mvp, model; identity44(model); multiply44x3(mvp, camera->proj, camera->view, model);
+    bool ok = unproject44(&out, xyd, vec4(0,0,window_width(),window_height()), mvp);
+    return out;
+#else
     // unproject 2d coord as 3d coord
     camera_t *camera = camera_get_active();
     float x = (2.0f * mouse_x) / window_width() - 1.0f;
@@ -24994,6 +24997,7 @@ vec3 editor_pick(float mouse_x, float mouse_y) {
     vec4 eye = vec4(p.x, p.y, -1.0, 0.0);
     vec4 wld = norm4(transform444(inv_view, eye));
     return vec3(wld.x, wld.y, wld.z);
+#endif
 }
 
 int editor_ui_bits8(const char *label, uint8_t *enabled) { // @to deprecate
diff --git a/engine/v4k.h b/engine/v4k.h
index 78e11ec..e171346 100644
--- a/engine/v4k.h
+++ b/engine/v4k.h
@@ -824,7 +824,7 @@ API void  (map_clear)(map* m);
 API char *cc4str(unsigned cc);
 API char *cc8str(uint64_t cc);
 
-enum { ///-
+enum {
 #   define _(a,b,c,d,e) cc__##a, cc__##b, cc__##c, cc__##d, cc__##e
     cc__1 = '1', _(2,3,4,5,6),_(7,8,9,0,_), cc__ = ' ',
     cc__A = 'A', _(B,C,D,E,F),_(G,H,I,J,K),_(L,M,N,O,P),_(Q,R,S,T,U),_(V,W,X,Y,Z),