I have mostly transitioned from Superphong to Superphysical for IBL, but for classic lighting with spot, directional or point lights, I am struggling to get results that resemble Superphong.
One of the main differences between Superphong and Superphysical is the way materials are handled, and I much prefer the metallicness and roughness approach.
For the lights instead of IAtt0, IAtt1 and IAtt2, there is now just IAtt0 (light intensity) and IAtt1 (falloff), but the values are very different. In superphong I had them all set around 0.3, but in superphysical its more like Intensity 10 and Falloff 0. But the lights just dont behave the same and in my eyes more correct way of Superphong:
When you move a light closer to a colored object the object should get brighter (ie. whiter if the light is also just white). But in SuperPhysical the colored objects get a little bit brighter, but also more saturated. See in the images below how the red objects turn pink in SuperPhysical. Tweaking all parameters I just can’t get it to look as natural as it did in SuperPhong.
Light far away in Superphong:
Light far away in Superphysical:
Light close in Superphong:
Light close in Superphysical (note unnatural colors):
Its almost like the increased value for saturation should be an increased value in brightness.