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Malcolm Moseley avatar image
Malcolm Moseley asked ·

Volume Shader vs Volume Sample

I'm trying to figure out why my volume density looks different when without a volumesample versus importing density with. And if there's a calculation I don't know about if density channel isn't connected. Or why the Volume Sample Float forces a remap. I would like to get a 1:1 result, as I would like to modify density in shader but I can't even get my basic volume's soft to hard range if I import it myself.


Cheers, if anyone can shed light on this.

volSample_Test3.JPGvolSample_Test.JPGvolSample_Test2.JPG

rendervolumes
volsample-test3.jpg (195.0 KiB)
volsample-test.jpg (220.9 KiB)
volsample-test2.jpg (191.1 KiB)
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Robert Chapman avatar image
Robert Chapman answered ·

You know what, I figured it out, just had to remove 'density' from the shader, since I was already using 'density' in the shader it was multiplying against itself.

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Robert Chapman avatar image
Robert Chapman answered ·

One of the FX artists at my company was just getting this same issue.


I know this is a bit late, but perhaps this bump can help get this some eyes on it.

His fix:
"I get matching values if I set the volumesamplefloat to Gain:1 and Output Max: 2"

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