Author Topic: Understanding Disney Specular  (Read 973 times)

2022-09-20, 22:26:49

dj_buckley

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Bear with me.

Various vendors (old and new) supply texture sets with 'Reflection' maps.  When using these with the Legacy Material, it was relatively logical.  The values in the reflection maps ranged from 0-1, which directly correlated with the reflection level spinner.

To use those same textures in the physical material, my understanding is that we need to specify Disney specular, then under the hood Corona is converting the values in the texture to IOR values?  Is that right?

If so, then is it also correct that any 0 values in the texture are being 'remapped' to IOR 1, and any 1 values are being remapped to IOR 1.8, and all the other grey values somewhere inbetween?

If I'm still on track, that makes our old reflection maps pretty useless for the physical material without reworking the maps in PS or something first so they fall within a range of 0 and 0.5 and thus behave in the same/similar way as they would with the legacy material??