I’m seeing odd MIP behavior for IBLs in the Sandbox.
I would prefer a higher-resolution IBL, so the skybox won’t be too blurry. But as the Specular resolution increases, the Roughness also increases.
If I zoom into a metallic sphere using the 512 IBL, the MIPs eventually clarify. But at a default distance it’s quite rough.
It seems to make sense, since the increased resolution means I have more MIPs. But the change in roughness is troublesome. Should we be biasing the MIPs?
64 Specular = 7 MIPs.
128 Specular = 8 MIPs.
256 Specular = 9 MIPs.
512 Specular = 10 MIPs.
IBLBaker settings for 256 Specular and 64 Diffuse: