1 files changed, 3 insertions, 1 deletions
diff --git a/source/blender/draw/engines/gpencil/shaders/gpencil_frag.glsl b/source/blender/draw/engines/gpencil/shaders/gpencil_frag.glsl
index 8c2032f834a..d81c6f4fe0b 100644
--- a/source/blender/draw/engines/gpencil/shaders/gpencil_frag.glsl
+++ b/source/blender/draw/engines/gpencil/shaders/gpencil_frag.glsl
@@ -99,8 +99,10 @@ void main()
     discard;
   }
 
+  vec2 fb_size = max(vec2(textureSize(gpSceneDepthTexture, 0).xy),
+                     vec2(textureSize(gpMaskTexture, 0).xy));
+  vec2 uvs = gl_FragCoord.xy / fb_size;
   /* Manual depth test */
-  vec2 uvs = gl_FragCoord.xy / vec2(textureSize(gpSceneDepthTexture, 0).xy);
   float scene_depth = texture(gpSceneDepthTexture, uvs).r;
   if (gl_FragCoord.z > scene_depth) {
     discard;