50% displacment not leaving geo alone - Vray

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Old 08 August 2013   #1
50% displacment not leaving geo alone - Vray

Hey guys,

I Used a 4092 texture map at 50% grey for base, 16bit & 8bit. Also checked & followed this tutorial and tried -0.5 for displacement shift which gave a worse off result. Thread about displacment

Can't seem to have 50% grey leave the geometry alone. Why? You'll notice the geometry ends up thicker regardless.

 
Old 08 August 2013   #2
50% grey actually just means "displace my geometry by half the value of white" you have to either change the 50% grey to black or change the "water line" by lowering the alpha offset to negative one-half of your alpha gain value in the displacement image file's Color Balance option. so if your alpha gain is 1.8, your alpha offset should be -0.9
 
Old 08 August 2013   #3
I think in the image you've posted the displacement shift would need to be -0.025
Thats 1/2 of your displacement amount (0.05) and negative.
If displacement was 1 the shift would be -0.5.
 
Old 08 August 2013   #4
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