Blotchy renders issue

[Penry]

Hi all,

I've read several posts relating to blotchy renders and tried all the suggestions to solve the problem but in this case nothing is working. I've changed the Hsph subdivs/interp samples/min & max rates/Global subs multiplier/light's subds/material's subs/interpolation types & sample look ups and nothing is making any difference.

Is there anything I am missing or should be looking at changing in my scene to get a smooth render?

[rmejia]

What does the material look like? It looks like the material and mapping is that way rather than blochiness from low settings.

[Penry]

Blotchy render issue

It's a simple Vray material with a diffuse colour & low reflection-not rocket science. I have similar materials in the scene which have rendered perfectly but on the cornice it doesn't want to play ball.

[Sascha Selent]

Complanar faces?

Just a shot in the dark:

It seems to me like complanar faces, especially because the problem occurs only a this specific object - maybe the object is twice in the scene matching complanar or any modifier did cloning by accident?

Had something similar and that was the reason.

[Penry]

Nope to coplanar

I've just remodelled the cornice and rendered with similar results.

Nice try but no cigar!

[Sascha Selent]

Test with material override

Test with grey-material override to spot if the material is the problem...

[TheMulf]

Just a guess, but I've had issues with noise on sweeps with little or no segments. If that is the case for you add more vertical segments, and try that.

[Penry]

ahhhh!

Just a guess, but I've had issues with noise on sweeps with little or no segments. If that is the case for you add more vertical segments, and try that.

Just modelled the cornice up again but doubled the faces and voila!

Many thanks everyone.....problem solved!