Read Depth Texture (Godot 3)

23 August 2022 - less than 1 min read time
Tags: Shaders Godot

float depth = texture(DEPTH_TEXTURE, SCREEN_UV).r;
vec3 screen_coords = vec3(SCREEN_UV, depth);
vec3 ndc = screen_coords * 2.0 - 1.0;
vec4 view_space = INV_PROJECTION_MATRIX * vec4(ndc, 1.0);
view_space.xyz /= view.w;
depth = -view.z;