linear depth (4.3+)

Firerabbit January 2, 2025January 2, 2025

Get a linear depth value from the DEPTH_TEXTURE (4.3+).

Apply this shader to a quad, which is attached to the camera.

Shader code

shader_type spatial;
render_mode unshaded, depth_draw_never;

uniform float depth_factor: hint_range(0.0, 256.0, 0.1) = 80.0;

uniform sampler2D DEPTH_TEXTURE: hint_depth_texture;

void fragment() {
	float depth = texture(DEPTH_TEXTURE, SCREEN_UV).r;
	float linear_depth = 1.0 / (depth * INV_PROJECTION_MATRIX[2].w + INV_PROJECTION_MATRIX[3].w);
	
	ALBEDO = vec3(linear_depth / depth_factor);
}

Tags

depth, depth_texture, linear

The shader code and all code snippets in this post are under CC0 license and can be used freely without the author's permission. Images and videos, and assets depicted in those, do not fall under this license. For more info, see our License terms.