Initial commit

shaders/chroma_key.gdshader

@@ -0,0 +1,12 @@
+shader_type canvas_item;
+
+uniform float threshold : hint_range(0.0, 1.0) = 0.01;
+
+void fragment() {
+	vec4 tex_color = texture(TEXTURE, UV);
+	float brightness = max(tex_color.r, max(tex_color.g, tex_color.b));
+	if (brightness < threshold) {
+		discard;
+	}
+	COLOR = tex_color;
+}