PDA

View Full Version : MR final gather - computing additional fg points

jujoje
05-02-2006, 01:56 AM
Hi,

I'm trying to render some helicopter rotor blades made from nurbs with final gather and a hdr image.

The final gather points are calculated fine however I keep getting the following message when mental ray is rendering the scene;

RCFG 0.3 progr: computed 6000 additional finalgather points for tile [224 255] x [320 351]

This message crops up fairly regularly and the rendering slows down dramatically. I was wondering if anyone could tell me what exactly this means and (since it seems to be a bad thing) how to fix it.

I found a previous post from a while back suggesting that you could just save the final gather map to a file and then freeze the final gather rebuild. However this didn't seem to have any effect for me.

I thought that it might be due to the model having several trimmed surfaces (since before I did the trims I didn't get that message) and any cracks between the trim and the adjacent surface causing problems for the final gather. However this appears not to be the case, since removing the trims had no effect.

Any help with this would be greatly appreciated,
dagon1978
05-02-2006, 02:33 AM
from paolo berto (http://www.jupiter-jazz.com/wordpress/wp-content/data/tr4kv2/html/chapter1-FG.html)


http://www.jupiter-jazz.com/wordpress/wp-content/data/tr4kv2/html/images/fg_redots.jpg
"These rendertime FG points are representer as red dots when using the diagnoseFinalg diagnostic mode:
The FG diagnostic mode shows also the rendering FG points as red dots, usually present on edges."


u have to read the "Diagnose FG" part to understand how to reduce these problems...
the freeze u mentioned is the deep freeze, but is not available in mr for maya, is a mr standalone feature... maybe with the next release we can use these advanced features in maya too ;)
jujoje
05-02-2006, 04:49 PM
Thanks a lot, got it working well now and even better, have an idea of why it was happening :thumbsup:
CGTalk Moderation
05-02-2006, 04:49 PM
This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.