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Forum Index - Texturing - Smooth faces look facted in the render

There are 6 replies to this topic

2 years ago

Hi guys,

I've been working on my photoreal challenge piece and I've run into a bit of a problem. I'm getting a faceted look on part of one of my models and I'm not sure why. It only started happening after I applied 2 separate materials to the one object, but I can't see why this would cause a problem. Anyone run into this before? I'm using Maya and mental ray btw.

[Link to www.3dprevis.com]
2nd Place: Absurd Plants Challenge

-Tyson
Senior Member

2 years ago

This may not be it but its the first thing I would try, Unlike max's smoothing groups, in Maya you have to adjust the normal angle by a threshold. with the object selected swap to the polygons menu set
and under "normals" go to "set normal angle" enter a value like 90 and you should get what you want. lower values make it faceted.

+Steve Martin
Moderator

2 years ago

Nah, still faceted I'm afraid. It's fine when I've got just the one material on it but when I add the second one it buggers up. I don't know why as it's essentially the same material with some displacement on top.

[Link to www.3dprevis.com]
2nd Place: Absurd Plants Challenge

+Steve Martin
Moderator

2 years ago

Got it!

It was the approximation settings that needed to be bumped up a bit. In the render settings under mentalray overrides > tesselation add a mentalray displaceapprox node to the displace approx setting. Then just up the levels until it looks right.

[Link to www.3dprevis.com]
2nd Place: Absurd Plants Challenge

+Steve Martin
Moderator

2 years ago

I'm glad I posted a solve, this topic just saved my arse again.

[Link to www.3dprevis.com]
2nd Place: Absurd Plants Challenge

-Tyson
Senior Member

2 years ago

Its funny when you solve your own problem again by looking it up this forum huh

I had to look up my own explanation of gimbal lock the other day

+Steve Martin
Moderator

2 years ago

It's like a giant online notepad that you never lose.

[Link to www.3dprevis.com]
2nd Place: Absurd Plants Challenge

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