diff --git a/engine/art/shaders/fs_24_4_sprite.glsl b/engine/art/shaders/fs_24_4_sprite.glsl
index 7050495..6a99df2 100644
--- a/engine/art/shaders/fs_24_4_sprite.glsl
+++ b/engine/art/shaders/fs_24_4_sprite.glsl
@@ -1,5 +1,5 @@
 uniform sampler2D u_texture;
-
+uniform float gamma; /// set:2.2
 
 in vec2 vTexCoord;
 in vec4 vColor;
@@ -54,4 +54,5 @@ void main() {
     vec4 texColor = texture_AA2(u_texture, vTexCoord);
     if(texColor.a < 0.9) discard;
     fragColor = vColor * texColor;
+    fragColor.rgb = pow(fragColor.rgb, vec3(gamma));
 }
\ No newline at end of file
diff --git a/engine/art/shaders/fs_32_4_model.glsl b/engine/art/shaders/fs_32_4_model.glsl
index 4ca85c4..2133565 100644
--- a/engine/art/shaders/fs_32_4_model.glsl
+++ b/engine/art/shaders/fs_32_4_model.glsl
@@ -17,7 +17,7 @@ in vec3 v_position;
 in vec3 v_position_ws;
 #ifdef RIM
 uniform mat4 M; // RIM
-uniform vec3 u_rimcolor = vec3(0.2,0.2,0.2);
+uniform vec3 u_rimcolor = vec3(0.05,0.05,0.05);
 uniform vec3 u_rimrange = vec3(0.11,0.98,0.5);
 uniform vec3 u_rimpivot = vec3(0,0,0);
 uniform bool u_rimambient = true;
@@ -445,7 +445,8 @@ void main() {
         }
         float rim = 1.0 - max(dot(v,n), 0.0);
         vec3 col = u_rimcolor*(pow(smoothstep(1.0-u_rimrange.x,u_rimrange.y,rim), u_rimrange.z));
-        fragcolor += vec4(col, 1.0);}
+        fragcolor += vec4(col, 0.0);
+    }
     #endif
 }
 #endif
@@ -719,7 +720,8 @@ void main(void)
         }
         float rim = 1.0 - max(dot(v,n), 0.0);
         vec3 col = u_rimcolor*(pow(smoothstep(1.0-u_rimrange.x,u_rimrange.y,rim), u_rimrange.z));
-        fragcolor += vec4(col, 1.0);}
+        fragcolor += vec4(col, 0.0);
+    }
     #endif
 }
 
diff --git a/engine/joint/v4k.h b/engine/joint/v4k.h
index de958ce..8b90f05 100644
--- a/engine/joint/v4k.h
+++ b/engine/joint/v4k.h
@@ -372374,10 +372374,11 @@ int ui_postfx(postfx *fx, int pass) {
 }
 
 static __thread array(handle) last_fb;
+static postfx gamma_fx;
 
 bool postfx_begin(postfx *fx, int width, int height) {
     // reset clear color: needed in case transparent window is being used (alpha != 0)
-    glClearColor(0,0,0,0); // @transparent
+    if (fx != &gamma_fx) glClearColor(0,0,0,0); // @transparent
 
     width += !width;
     height += !height;
@@ -372504,7 +372505,7 @@ bool postfx_end(postfx *fx) {
     return true;
 }
 
-static postfx fx, gamma_fx;
+static postfx fx;
 int fx_load_from_mem(const char *nameid, const char *content) {
     do_once postfx_create(&fx, 0);
     return postfx_load_from_mem(&fx, nameid, content);
diff --git a/engine/split/v4k_render.c b/engine/split/v4k_render.c
index 8d9a113..9fa5aa0 100644
--- a/engine/split/v4k_render.c
+++ b/engine/split/v4k_render.c
@@ -2354,10 +2354,11 @@ int ui_postfx(postfx *fx, int pass) {
 }
 
 static __thread array(handle) last_fb;
+static postfx gamma_fx;
 
 bool postfx_begin(postfx *fx, int width, int height) {
     // reset clear color: needed in case transparent window is being used (alpha != 0)
-    glClearColor(0,0,0,0); // @transparent
+    if (fx != &gamma_fx) glClearColor(0,0,0,0); // @transparent
 
     width += !width;
     height += !height;
@@ -2484,7 +2485,7 @@ bool postfx_end(postfx *fx) {
     return true;
 }
 
-static postfx fx, gamma_fx;
+static postfx fx;
 int fx_load_from_mem(const char *nameid, const char *content) {
     do_once postfx_create(&fx, 0);
     return postfx_load_from_mem(&fx, nameid, content);
diff --git a/engine/v4k.c b/engine/v4k.c
index cc7a08b..df6deb7 100644
--- a/engine/v4k.c
+++ b/engine/v4k.c
@@ -19529,10 +19529,11 @@ int ui_postfx(postfx *fx, int pass) {
 }
 
 static __thread array(handle) last_fb;
+static postfx gamma_fx;
 
 bool postfx_begin(postfx *fx, int width, int height) {
     // reset clear color: needed in case transparent window is being used (alpha != 0)
-    glClearColor(0,0,0,0); // @transparent
+    if (fx != &gamma_fx) glClearColor(0,0,0,0); // @transparent
 
     width += !width;
     height += !height;
@@ -19659,7 +19660,7 @@ bool postfx_end(postfx *fx) {
     return true;
 }
 
-static postfx fx, gamma_fx;
+static postfx fx;
 int fx_load_from_mem(const char *nameid, const char *content) {
     do_once postfx_create(&fx, 0);
     return postfx_load_from_mem(&fx, nameid, content);