jak-project/game/graphics/opengl_renderer/shaders/sky.frag

#version 330 core

out vec4 color;

in vec4 fragment_color;
in vec3 tex_coord;
uniform sampler2D tex_T0;

void main() {
    vec4 T0 = texture(tex_T0, tex_coord.xy / tex_coord.z);
    T0.w = 1.0;
    color = fragment_color * T0 * 1.0;
}