how to correct this error

# 1 28-08-2005 , 06:48 PM

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Join Date: Sep 2002

Location: northampton

Posts: 249

this is the error when rendering sub d in Mental Ray
// Error: (Mayatomr.Geometry) : BoyHeadShape, non-quadrilateral face in subdivision surface base mesh not supported, ignored //
// Error: (Mayatomr.Geometry) : DuctShape, non-quadrilateral face in subdivision surface base mesh not supported, ignored //

Can anyone help me why I cant render this sub d?
I have converted it to polys and done a clean up but still the same error.

Cheers all

It is by my will alone I set my mind in motion

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# 2 29-08-2005 , 01:44 AM

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Join Date: Feb 2004

Posts: 2,988

mentral ray dosnt really like subds. if you want it to work, all the faces have to be quads. have fun :S

Imagination is more important than knowledge.

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# 3 29-08-2005 , 02:02 AM

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Join Date: Dec 2004

Location: Melbourne, Australia

Posts: 36

If you can't find the triangles use collapse hierachy of your sub-d mesh although this will create alot more geometry so where possible find and split the triangles.

Adam

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# 4 29-08-2005 , 07:46 AM

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Join Date: Sep 2002

Location: northampton

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thanks guys

It is by my will alone I set my mind in motion

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# 5 29-08-2005 , 08:24 AM

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Join Date: Sep 2002

Location: northampton

Posts: 249

emmm, when I callapse the sub d all my UV's become messed up, looks a right mess.

It is by my will alone I set my mind in motion

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# 6 29-08-2005 , 10:44 AM

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Join Date: Jun 2004

Location: London, England

Posts: 301

Hi there.

A better way to render sub-d's in Mental Ray is to use Mental Ray sub-d's by attaching an approximation mesh node to your objects. This is really simple to do and I've explained how to use it here:

https://forum.simplymaya.com/showthre...090#post164090

The lower the value you use for the length , the smoother the sub-d will be, but it will take longer to calculate. The other advantage to this is that you can UV map the low poly mesh, and Mental Ray will still apply the texture correctly to the sub-d, whereas with Maya sub-d's you have to UV map the sub-d surface to stop the texures from going wierd.

Hope this will solve your problem.

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