(hopefully) quick question about displacement tesselation

Become a member of the CGSociety

Connect, Share, and Learn with our Large Growing CG Art Community. It's Free!

THREAD CLOSED
 
Thread Tools Search this Thread Display Modes
Old 11 November 2013   #1
(hopefully) quick question about displacement tesselation

Hey CG Folk! Long time reader, first time poster.

So hopefully this is a quick question, I've done a bit of investigating.

I'm rendering a displacement map from Mudbox 2012 to Maya 2012 (64 bit) using Mental Ray (Production settings with IBL and Final Gather), and I'm getting what looks like poor tesselation. It's very telling when you zoom into the model, but is still kind of noticeable from a distance,to me, anyway. The following renders are displacement only (no normal mapping)



here's zoomed in:



vs the model in mudbox:



In Mudbox, my displacement settings are: Raycasting, closest to source mesh, search distance 2.95 (found by trial-and-error to get best range-of-values in disp map). Anti-aliasing set to max (8x), map is 2k, 16-bit tiff. Source mesh vs base mesh:





I got the same result regardless of anti-aliasing setting, using 8 bit pngs or 16 bit tiffs.

To me the artifacts really look like triangular which makes me think tesselation. I'm thinking it could be either:

1. needing a higher poly base mesh
or
2. a better approach to tesselation (maybe Mental Ray's Approximation Editor?)

Any advice? I appreciate it, folks. Thank you!
 
Old 11 November 2013   #2
Yeah, you'll want to use the Approximation Editor. If you just smooth by pressing 3, it won't necessarily give you the density you need.
__________________
kevinbakercg.com
 
Old 11 November 2013   #3
wow, that is interesting...

this looks more like the errors I get from transferring maps in Maya when the high poly mesh doesn't have smooth normals, but I'm not sure that applies to your case from MudBox.
 
Old 02 February 2014   #4
Meloncov, thanks, that was it. I appreciate it.
 
Old 02 February 2014   #5
Thread automatically closed

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.
__________________
CGTalk Policy/Legalities
Note that as CGTalk Members, you agree to the terms and conditions of using this website.
 
Thread Closed share thread



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
CGSociety
Society of Digital Artists
www.cgsociety.org

Powered by vBulletin
Copyright 2000 - 2006,
Jelsoft Enterprises Ltd.
Minimize Ads
Forum Jump
Miscellaneous

All times are GMT. The time now is 06:31 PM.


Powered by vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.