new

engine/assets/shader/death_display.gdshader

@@ -0,0 +1,9 @@
+shader_type canvas_item;
+
+uniform sampler2D SCREEN_TEXTURE : hint_screen_texture,filter_linear_mipmap;
+
+void fragment() {
+    vec4 screen_color = texture(SCREEN_TEXTURE, SCREEN_UV);
+    float gray = dot(screen_color.rgb, vec3(0.299, 0.587, 0.114));
+    COLOR = vec4(gray, gray, gray, screen_color.a);
+}