Pixel-Composer/shaders/sh_blend_luma/sh_blend_luma.yy

{
  "resourceType": "GMShader",
  "resourceVersion": "1.0",
  "name": "sh_blend_luma",
  "parent": {
    "name": "blend",
    "path": "folders/shader/blend.yy",
  },
  "type": 1,
}