shader_type spatial;
render_mode unshaded, blend_add, depth_draw_never, cull_disabled;

uniform vec3 ray_color : source_color = vec3(0.7, 0.9, 1.0);
uniform float intensity : hint_range(0, 2) = 0.6;
uniform float fade_bottom : hint_range(-100, 0) = -30.0;

void fragment() {
	vec2 uv = UV;
	float rays = 0.0;
	// Multiple ray stripes
	for (float i = 0.0; i < 5.0; i++) {
		float offset = i * 0.2 + TIME * 0.03;
		float r = smoothstep(0.02, 0.0, abs(fract(uv.x * 8.0 + offset) - 0.5));
		rays += r * (1.0 - i / 5.0);
	}
	// Fade vertical
	float vertical_fade = smoothstep(0.0, 0.4, 1.0 - uv.y);
	// Fade avec profondeur joueur
	float depth_fade = clamp((VERTEX.y - fade_bottom) / (60.0 - fade_bottom), 0.0, 1.0);

	float final_alpha = rays * vertical_fade * depth_fade * intensity;
	ALBEDO = ray_color;
	ALPHA = final_alpha;
}