Old envmap code Fix cubemaps always using 1 extra cubemap they shouldn't be (need shader rebuild) Before: https://files.facepunch.com/matt/1b0211b1/sbox_ZJY2zoiVoF.png After: https://files.facepunch.com/matt/1b0211b1/sbox_Gvuv88s1oY.png convolve_environment_map.shader - optimized compile + vk shader