Despot wrote:Coating in the universal material is not working correctly... I don't think.
I've attached 2 images , one using the tried and tested mix material method and the other using coating via the universal material.
The latter doesn't look correct to me, a coating should be a clear coat-like surface (see first image), especially when I have a relatively high IOR and zero roughness (see attached).
I've tried with higher IOR values and also with different material attributes for the 'base' material and nothing works.
Am I missing something here, or is this a bug ?
coating_via_mix.jpg
coating_via_universal.jpg
coating_settings.jpg
@Despot - I find this type of subject very interesting.
Could you remove coating on both versions to see that they are identical, and then play with adding the Coating channel specifically on each, so that you can step by step mirror each move towards the desired effect...in the case of Universal, modify the power and Gamma of the Coating channel's texture image, and then also the Coating channel's roughness, this might work.
I'm thinking that the version with the Mix, as described in your post, almost is being assumed as if it were the correct 'default' here, when in fact it is itself is a modified version of 2 basic materials mixed together.
In other words, you are not emulating so much a 'regular' basic Coating effect as it exists in an underlying material, but rather a more complex 'Mix' version of a coating effect (MIX of something + something else to generate a Coating-looking effect)....
you know what I'm saying? It might make more sense to recreate each step by step so that your end version in the Universal mirrors the 'look' of the coating effect you achieved in the Mix.
Just a thought, as I also see weird differences, more notably in my case with the SSS generated between Diffuse and Universal.
I had to alter the Universal not to operate as if it
were the Diffuse channel, but rather operate it to end up looking
like the Diffuse channel. Unfortunately I think the Universal's Transmission is getting screwed up by its roughness IOR effects, because the Transmission turns into a 'shine'.
And so with the Coating you want to replicate, maybe you might not be able to recreate it, but then you can let Otoy know exactly where the breakdown happens, and they maybe can work it from there.
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