Simple CRT Bulge

blitpxl December 1, 2025December 3, 2025

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Shader code

shader_type canvas_item;
uniform float intensity: hint_range(-1.0, 1.0, 0.001) = 0.065;
uniform sampler2D ST : hint_screen_texture, filter_nearest;

void fragment() {
	float map = distance(SCREEN_UV, vec2(0.5));
	COLOR = texture(ST, vec2(
		SCREEN_UV.x - (map - 0.5) * intensity * (0.5 - SCREEN_UV.x),
		SCREEN_UV.y - (map - 0.5) * intensity * (0.5 - SCREEN_UV.y))
	);
}

Tags

barrel, bulge, CRT, distortion, monitor, retro, simple, uv

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