Trying to make a correct "normal map form height/depth" with emboss and edge detect?

[kirk23]

I have just figured out that by recording a  switch to 32 bit mode and  back in a macro we could get many filters  working in a new perfect manner. 

So I am trying an ancient trick with producing normal map RG (xy) channels by embos filter   and B (z) channel by   edge detect filter   inverted.

It all works just  fine except gamma .      Switching back to 16 or 8 bit  makes a gamma shift  and I am struggling to figure out the right values.   Can't get a perfect 128 (0,5) value  for front  looking pixels   in RG channels.

 

Any suggestions?

[NotMyFault]

Gamma is simple c^2.2 or c^(1/2.2) depending on direction.

c for every color channel. Alpha channel might be excepted (test it with A=0.5 if it stays 0.5 or becomes 0.2 something)

PS if gamma is in your way while in RGB/8, just set it from 2.2 to 1, maybe set it to 1.0 as default in preferences.

Edited November 14, 2021 by NotMyFault