Hi all, I mad a hi res (240 PPI) render for print. Print size is 53x75 cm, or about 21x30 inches, and the problem I have is the patterns appearing on the terrain. these patterns are apparently due to the global turbulence applied to the raedy made Vue material (Arizona, from the landscapes collection). Now if you render for showing here, even at 4000x3000 pixels, at 72 ppi, you won't notice it, but higher res and size results in the image shown here. Now, in PS, when I ask for display at print size, it almost doesn't show, but almost. If I get rid of the turbulence, the material is very repetitive. The golabl turbulence complexity is set to 2, I didn't try yet to rise to 5. Now I made an experiment in C4D where I applied some turbulence noise to a cube, both in the colour & bump channels, and rendered. No patterns, although you can't really compare Vue and Cinema shaders. Do you think this could be a bug, and then I should report, or is this normal?

Iwould ask technical support at e-on indeed. They will know best what it could be - and how to avoid it. Have you played with the overall material size a little? Maybe this could solve your problem. Maybe. In the meantime i would use the clone copier in Photoshop and correct that - is fastest.

Yeah, wabe, I change the overall size to 0.5, and the pattern is still there, just 50% smaller. Thanks for your quick answer.

I would go both ways. Make it really small - like 0.05 (because of the big size of the image) and see. And then go to a really BIG value - like 5 or 20 to see what this result in. Just a thought.

Values of 5 give aweful results, but very small values give better results, but the material gets very repetitive.

Maybe you can add a little noise to the function? Mathematical terms have a tendency to be repetitive i fear. Same calculation always give the same result - in a way.

Yes, I tried adding some cycling to the mat, and it looks a bit better. What would be interesting to know is: does this global turbulence is also added to the bump channel? I think not, since the pattern looks really flat.

Hard to say - but you can try it out and maybe disconnect the bump channels for a test. Then you will know.

Right, I'll do this tomorrow, need some sleen now, getting up tomorrow way too early for my liking! Thanks agin for your kind help.