brightness.shader

shader_type canvas_item;

uniform float brightness = 0.5;

void fragment(){
	vec4 pixel_color = texture(SCREEN_TEXTURE, SCREEN_UV, 1);

	COLOR.rgb = vec3(dot(pixel_color.rgb, vec3(brightness, brightness, brightness)));
}

shader_type canvas_item;
render_mode unshaded;

void fragment() {
vec4 color = texture(SCREEN_TEXTURE, SCREEN_UV);
COLOR.rgb = vec3(dot(color.rgb, vec3(0.25, 0.25, 0.25)));
}