Transparency ?

[Matt]

(But I still wonder what is the difference between the noise of the function (Voronoi 3D diff scalar) and the noise from the Powerfractalv3?)

The bug only affects texture coordinates (UVs or UVWs). The Powerfractal uses texture coordinates (as do most shaders, although some are configurable). In your project you have a Get Position node plugged into the Voronoi. Get Position is not affected by the bug. If you had plugged in a Get Position in Texture (which I recommend for anything should be a texture), it would suffer from the same bug as the Power Fractal.

This bug will be fixed in the next TG3 release.

Matt

[Kadri]

I found an old post where Matt said this:
"There is a bug in 2.1.18.1 which requires objects to have UVs if they are ray traced. If you render without ray tracing, your objects do not need UVs."
http://www.planetside.co.uk/forums/index.php/topic,8557.msg91691.html#msg91691

Probably not yet fixed.But it is still easy to use the powerfractal node when you UV map the object as you see.

I thought I had fixed it in the very public release, v2.2. But it looks like the bug remained for opacity calculations only.

I've fixed this now so it should work in the next TG3 release.

Matt

Thanks Matt!

[russe166]

Thanks Matt for the answer. Now I understand much better.

Michael