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zsolnai
06-11-2010, 10:19 PM
I've been watching a DT tutorial on Mental Ray in Maya 2009 and tried to follow using Maya 2011. When the guy started to emit light from his HDR image, his machine made the rendering in 3 minutes. Mine, with exactly the same settings made it in 1 hour and 1 minute. And there were no shadows where there should have been many.

Then, on the same machine, I loaded up the scene in Maya 2009 and ta da, done in 2 and a half minutes, beautiful shadows everywhere.

How on Earth is this possible? What did they change in Mental Ray for Maya 2011 that results in this?

Anyone?

djx
06-12-2010, 08:20 AM
Can you post the scene so we can try and confirm your findings? And maybe figure out the cause.

David

wardy150
06-12-2010, 09:32 AM
Yeah I have the same issue with 2011 (osx) so I avoid activating the emit light attribute. I remember seeing a thread about this on the area forums.

zsolnai
06-12-2010, 03:14 PM
Can you post the scene so we can try and confirm your findings? And maybe figure out the cause.

David

You can download the project from here. (http://www.zsolnai.com/public/ibl_emit_light.zip)
http://www.zsolnai.com/public/ibl_emit_light.zip

Supadiri
06-12-2010, 05:13 PM
Your link is broken.

zsolnai
06-12-2010, 05:27 PM
Your link is broken.

It's been repaired.

Supadiri
06-12-2010, 06:45 PM
On Maya 2011, Win7, it takes forever.

zsolnai
06-12-2010, 07:26 PM
On Maya 2011, Win7, it takes forever.

yes, and see if it looks like this in the end:

http://www.zsolnai.com/public/ibl_test_2009.jpg

rendered in Maya 2009

Supadiri
06-12-2010, 08:15 PM
yes, and see if it looks like this in the end:



As soon as I got time to wait that to render :)

RagingBull
06-15-2010, 10:34 PM
I'll take a look at this tomorrow, unless I'm still fiddling with my car :surprised

qjp
06-16-2010, 07:28 AM
From Maya help ...
Normal Tolerance http://download.autodesk.com/us/maya/2011help/images/MED/Sherlock/StdGraphics/NewForMaya8.png


Use this attribute to specify the maximum angle, in degrees, up to which a final gather point normal may deviate from the surface normal for the final gather point to be considered for interpolation.

A lower value may increase rendering times while a higher value decreases rendering times.

The valid range is 0 to 90 degrees and the default is 25.842.




Cheers

zsolnai
06-16-2010, 08:52 AM
A lower value may increase rendering times while a higher value decreases rendering times.

The valid range is 0 to 90 degrees and the default is 25.842.


Same file, same settings, except for Normal Tolerance, which is set to 89.999. The only thing it caused is an INCREASE in rendertime by approximately 6 minutes.

The image still doesn't look the way it should.

http://www.zsolnai.com/public/ibl_test_2011.jpg

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06-16-2010, 08:52 AM
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