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Iray cutout oppacity weirdness

felisfelis Posts: 4,305
in Technical Help (nuts n bolts)

I randomly found a weirdness in Iray, which I, for now at least, are considering a bug.

In the attached image is our lovely Victoria 8 - in 2 versions.

One is default out of the box. The second has a pure white image in the cutout oppacity for the face. My expectation was that it shouldn't make any difference.

But it is clear that it has.

Exactly why it is happening, I don't know. I suspect that it might somehow affect SSS.

Anybody who know why, and if it is the expected behaviour?

Iray_cutout0.png
1600 x 900 - 1M

Comments

  • HylasHylas Posts: 4,981

    Yes, putting any map in Cutout Opacity - even an entirely white one - will screw with Translucency/SSS.

  • felisfelis Posts: 4,305

    Hylas said:

    Yes, putting any map in Cutout Opacity - even an entirely white one - will screw with Translucency/SSS.

    Has it been this way previously?

    I only have DS 4.15. 

  • Richard HaseltineRichard Haseltine Posts: 100,745

    felis said:

    Hylas said:

    Yes, putting any map in Cutout Opacity - even an entirely white one - will screw with Translucency/SSS.

    Has it been this way previously?

    I only have DS 4.15. 

    Yes, using any Cutout Opacity implies that the surface is not a volume.

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