diff --git a/MAKE.bat b/MAKE.bat
index 8a05b85..ceb43b9 100644
--- a/MAKE.bat
+++ b/MAKE.bat
@@ -43,6 +43,7 @@ if "%1"=="help" (
     echo    nov4k    \ do not compile framework
     echo    demos    ^| do compile demos
     echo    editor   / do compile editor
+    echo    run      ^| run compiled .exe
     echo    vis      ^> visualize invokation cmdline.
     echo    args     ^> after `--` separator is found, pass all remaining arguments to compiler as-is
     echo.
@@ -359,6 +360,7 @@ set editor=no
 set vis=no
 set proj=no
 set rc=0
+set run=no
 
 :parse_args
     if "%1"=="--"       shift && goto parse_compiler_args
@@ -386,6 +388,7 @@ set rc=0
     if "%1"=="noeditor" set "editor=no" && goto loop
     if "%1"=="hello"    set "hello=yes" && goto loop
     if "%1"=="editor"   set "editor=yes" && set "hello=no"&& goto loop
+    if "%1"=="run"      set "run=yes" && goto loop
     if "%1"=="all"      set "v4k=yes" && set "demos=yes" && set "extras=yes" && set "editor=yes" && set "hello=yes" && goto loop
 
     if "%1"=="tcc"      set "cc=%1" && goto loop
@@ -623,6 +626,10 @@ if "!vis!"=="yes" echo !cc! !other! !import! !args!
      !echo! !other! && !cc! !other! !import! !args! || set rc=1
 )
 
+rem if "!run!"=="yes" (
+rem     !
+rem )
+
 rem PAUSE only if double-clicked from Windows explorer
 rem (((echo.%cmdcmdline%)|%WINDIR%\system32\find.exe /I "%~0")>nul)&&pause
 
diff --git a/demos/99-compute.c b/demos/99-compute.c
index 0cc1331..a352497 100644
--- a/demos/99-compute.c
+++ b/demos/99-compute.c
@@ -10,7 +10,7 @@ int main() {
     unsigned comp = compute(vfs_read("shaders/compute-test.glsl"));
     texture_t tex = texture_create(TEX_WIDTH, TEX_WIDTH, 4, 0, TEXTURE_LINEAR|TEXTURE_FLOAT);
     shader_bind(comp);
-    shader_image(tex, 0, 0, 0, READ);
+    shader_image(tex, 0, 0, 0, BUFFER_READ);
 
     struct {
         float f;
diff --git a/engine/art/shaders/header_shadertoy.glsl b/engine/art/shaders/header_shadertoy.glsl
index 8ac26a2..886064c 100644
--- a/engine/art/shaders/header_shadertoy.glsl
+++ b/engine/art/shaders/header_shadertoy.glsl
@@ -21,4 +21,4 @@ out vec4 fragColor;
 void mainImage( out vec4 fragColor, in vec2 fragCoord );
 void main() {
    mainImage(fragColor, texCoord.xy);
-}
\ No newline at end of file
+}
diff --git a/engine/bind/v4k.lua b/engine/bind/v4k.lua
index 1b97e52..16028b1 100644
--- a/engine/bind/v4k.lua
+++ b/engine/bind/v4k.lua
@@ -2360,10 +2360,10 @@ int texture_width;
      void shader_colormap(const char *name, colormap_t cm);
  unsigned shader_get_active();
  void     shader_destroy(unsigned shader);
-enum ACCESS_MODE {
-READ,
-WRITE,
-READ_WRITE
+enum BUFFER_ACCESS_MODE {
+BUFFER_READ,
+BUFFER_WRITE,
+BUFFER_READ_WRITE
 };
  unsigned compute(const char *cs);
  void compute_dispatch(unsigned wx, unsigned wy, unsigned wz);
@@ -2371,7 +2371,7 @@ READ_WRITE
  void shader_image_unit(unsigned texture, unsigned unit, unsigned level, int layer, unsigned texel_type, unsigned access);
  void image_write_barrier();
  void write_barrier();
-enum USAGE_MODE {
+enum SSBO_USAGE_MODE {
 STATIC_DRAW,
 STATIC_READ,
 STATIC_COPY,
@@ -2381,6 +2381,11 @@ DYNAMIC_COPY,
 STREAM_DRAW,
 STREAM_READ,
 STREAM_COPY
+};
+enum SSBO_ACCESS {
+SSBO_READ = BUFFER_READ,
+SSBO_WRITE = BUFFER_WRITE,
+SSBO_READ_WRITE = BUFFER_READ_WRITE
 };
  unsigned ssbo_create(const void *data, int len, unsigned usage);
  void ssbo_destroy(unsigned ssbo);
diff --git a/engine/joint/v4k.h b/engine/joint/v4k.h
index 5a68adf..d14d95d 100644
--- a/engine/joint/v4k.h
+++ b/engine/joint/v4k.h
@@ -16490,13 +16490,14 @@ API     void shader_colormap(const char *name, colormap_t cm);
 API unsigned shader_get_active();
 API void     shader_destroy(unsigned shader);
 
-// compute shaders
-enum ACCESS_MODE {
-    READ,
-    WRITE,
-    READ_WRITE
+enum BUFFER_ACCESS_MODE {
+    BUFFER_READ,
+    BUFFER_WRITE,
+    BUFFER_READ_WRITE
 };
 
+// compute shaders
+
 /// Loads the compute shader and compiles a GL program.
 /// return: GL program, 0 if failed.
 /// cs: shader source code
@@ -16542,7 +16543,7 @@ API void write_barrier();
 /// `DRAW` favors CPU->GPU operations.
 /// `READ` favors GPU->CPU operations.
 /// `COPY` favors CPU->GPU->CPU operations.
-enum USAGE_MODE {
+enum SSBO_USAGE_MODE {
     STATIC_DRAW,
     STATIC_READ,
     STATIC_COPY,
@@ -16556,6 +16557,12 @@ enum USAGE_MODE {
     STREAM_COPY
 };
 
+enum SSBO_ACCESS {
+    SSBO_READ = BUFFER_READ,
+    SSBO_WRITE = BUFFER_WRITE,
+    SSBO_READ_WRITE = BUFFER_READ_WRITE
+};
+
 /// Create Shader Storage Buffer Object
 /// !!! `data` can be NULL
 /// data: optional pointer to data to upload
@@ -349016,8 +349023,8 @@ void window_hints(unsigned flags) {
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); // osx
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2); // osx, 2:#version150,3:330
     #else
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 5);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
     #endif
     #ifdef __APPLE__
         glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); //osx
diff --git a/engine/split/v4k_render.h b/engine/split/v4k_render.h
index ef77fcf..5cccc91 100644
--- a/engine/split/v4k_render.h
+++ b/engine/split/v4k_render.h
@@ -335,13 +335,14 @@ API     void shader_colormap(const char *name, colormap_t cm);
 API unsigned shader_get_active();
 API void     shader_destroy(unsigned shader);
 
-// compute shaders
-enum ACCESS_MODE {
-    READ,
-    WRITE,
-    READ_WRITE
+enum BUFFER_ACCESS_MODE {
+    BUFFER_READ,
+    BUFFER_WRITE,
+    BUFFER_READ_WRITE
 };
 
+// compute shaders
+
 /// Loads the compute shader and compiles a GL program.
 /// return: GL program, 0 if failed.
 /// cs: shader source code
@@ -387,7 +388,7 @@ API void write_barrier();
 /// `DRAW` favors CPU->GPU operations.
 /// `READ` favors GPU->CPU operations.
 /// `COPY` favors CPU->GPU->CPU operations.
-enum USAGE_MODE {
+enum SSBO_USAGE_MODE {
     STATIC_DRAW,
     STATIC_READ,
     STATIC_COPY,
@@ -401,6 +402,12 @@ enum USAGE_MODE {
     STREAM_COPY
 };
 
+enum SSBO_ACCESS {
+    SSBO_READ = BUFFER_READ,
+    SSBO_WRITE = BUFFER_WRITE,
+    SSBO_READ_WRITE = BUFFER_READ_WRITE
+};
+
 /// Create Shader Storage Buffer Object
 /// !!! `data` can be NULL
 /// data: optional pointer to data to upload
diff --git a/engine/split/v4k_window.c b/engine/split/v4k_window.c
index 98ced40..03d0b64 100644
--- a/engine/split/v4k_window.c
+++ b/engine/split/v4k_window.c
@@ -174,8 +174,8 @@ void window_hints(unsigned flags) {
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); // osx
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2); // osx, 2:#version150,3:330
     #else
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 5);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
     #endif
     #ifdef __APPLE__
         glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); //osx
diff --git a/engine/v4k.c b/engine/v4k.c
index 359f870..f6ec920 100644
--- a/engine/v4k.c
+++ b/engine/v4k.c
@@ -19932,8 +19932,8 @@ void window_hints(unsigned flags) {
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); // osx
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2); // osx, 2:#version150,3:330
     #else
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
-    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 5);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
     #endif
     #ifdef __APPLE__
         glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); //osx
diff --git a/engine/v4k.h b/engine/v4k.h
index 0b7df70..730f812 100644
--- a/engine/v4k.h
+++ b/engine/v4k.h
@@ -2573,13 +2573,14 @@ API     void shader_colormap(const char *name, colormap_t cm);
 API unsigned shader_get_active();
 API void     shader_destroy(unsigned shader);
 
-// compute shaders
-enum ACCESS_MODE {
-    READ,
-    WRITE,
-    READ_WRITE
+enum BUFFER_ACCESS_MODE {
+    BUFFER_READ,
+    BUFFER_WRITE,
+    BUFFER_READ_WRITE
 };
 
+// compute shaders
+
 /// Loads the compute shader and compiles a GL program.
 /// return: GL program, 0 if failed.
 /// cs: shader source code
@@ -2625,7 +2626,7 @@ API void write_barrier();
 /// `DRAW` favors CPU->GPU operations.
 /// `READ` favors GPU->CPU operations.
 /// `COPY` favors CPU->GPU->CPU operations.
-enum USAGE_MODE {
+enum SSBO_USAGE_MODE {
     STATIC_DRAW,
     STATIC_READ,
     STATIC_COPY,
@@ -2639,6 +2640,12 @@ enum USAGE_MODE {
     STREAM_COPY
 };
 
+enum SSBO_ACCESS {
+    SSBO_READ = BUFFER_READ,
+    SSBO_WRITE = BUFFER_WRITE,
+    SSBO_READ_WRITE = BUFFER_READ_WRITE
+};
+
 /// Create Shader Storage Buffer Object
 /// !!! `data` can be NULL
 /// data: optional pointer to data to upload