t08-re/fadein.gdshader

shader_type canvas_item;
render_mode unshaded;

uniform float cutoff: hint_range(0.0, 1.0);
uniform sampler2D mask: source_color;
uniform float smoothSize : hint_range(0.0, 1.0);



void fragment() {
	// Called for every pixel the material is visible on.
	float value = texture(mask, UV).r;
	float alpha = smoothstep(cutoff, cutoff+smoothSize, value);
	COLOR = vec4(COLOR.rgb, alpha);

}

//void light() {
	// Called for every pixel for every light affecting the CanvasItem.
	// Uncomment to replace the default light processing function with this one.
//}