Pixelate a sprite

Mosaic effect for a single sprite: retro looks, censor blocks, or a dissolve into pixels when you animate it.

Settings:

amount (1-32): block size in texture pixels. Tween it for a pixelate transition.

Works with the Compatibility renderer and respects the node modulate.

This shader is part of the free 2D FX Essentials pack (9 sprite shaders with a demo scene): https://dimensionalmios.itch.io/almios-2d-fx-essentials

Shader code

shader_type canvas_item;

// Mosaic a sprite: retro looks, censor blocks, transitions. `amount` is the block size in texels.
uniform float amount : hint_range(1.0, 32.0) = 8.0;

varying vec4 vertex_tint;   // modulate and self_modulate, applied at the end

void vertex() {
	vertex_tint = COLOR;
}

void fragment() {
	vec2 grid = TEXTURE_PIXEL_SIZE * amount;
	vec2 uv = floor(UV / grid) * grid + grid * 0.5;
	COLOR = textureLod(TEXTURE, uv, 0.0);   // (no blurred line at each block edge with mipmaps)
	COLOR *= vertex_tint;
}