Introduction to Maya - Rendering in Arnold
This course will look at the fundamentals of rendering in Arnold. We'll go through the different light types available, cameras, shaders, Arnold's render settings and finally how to split an image into render passes (AOV's), before we then reassemble it i
#
1
16-05-2012
, 11:30 AM
Registered User
Join Date: Nov 2011
Join Date: Nov 2011
Location: Sydney
Posts: 196
Vray strange thing?
(these could be chrome headlight rims for example, a situation where you would mirror the geometry.)
Now I apply a Vray mtl surface to both objects.
Now I render this simple set up and find that the duplicated object has a different look to the original.
And here's the funny part, if I reverse the normals on the duplicated object and then render, they will now both look correct.
Has anyone struck this anomaly?
It's got something to do with Vray materials, and duplicated mirrored geometry. If I just do a straight duplicate I will not get this problem, so it must have something to do with the flipped or reversed nature of the duplicated geometry.
Last edited by djwaterman; 16-05-2012 at 11:43 AM.
#
2
16-05-2012
, 12:14 PM
Lifetime Member
Join Date: May 2011
Join Date: May 2011
Location: Riyadh, Saudi Arabia
Posts: 525
Jay explained it quite well:
Sometimes issues like this can also occur when you dupe an object and reverse it along a -x axiz or - z axis. When you freeze the transform Maya will warn you about negative faces. You need to go into the attribute Editor and turn off opposite. this will then cause the mesh to flip again and you'll need to again reverse the surface normals.
#
3
16-05-2012
, 12:43 PM
Registered User
Join Date: Nov 2011
Join Date: Nov 2011
Location: Sydney
Posts: 196
#
4
16-05-2012
, 01:11 PM
Registered User
Join Date: Nov 2011
Join Date: Nov 2011
Location: Sydney
Posts: 196
#
5
16-05-2012
, 01:33 PM
Lifetime Member
Join Date: May 2011
Join Date: May 2011
Location: Riyadh, Saudi Arabia
Posts: 525
https://simplymaya.com/forum/showthre...=36625&page=11Interesting. Can you put up the link to the original thread? I'd like to have a read.
The first image is a simple cube where the left cube was created with using duplicate special with -1 across the x-axis.Also, I can't find 'opposite' in the attribute editor.
The second image is the warning you get when you freeze transformations. Now the opposite attribute is set under Renderstats of the shape node.
You need to uncheck "Double sided", uncheck "Opposite" and then reset "Double sided". After this you will see your normals are reversed in the UV editor.
#
6
17-05-2012
, 04:53 AM
Registered User
Join Date: Nov 2011
Join Date: Nov 2011
Location: Sydney
Posts: 196
Posting Rules Forum Rules
Similar Threads
Dr Strange VFX reel - Framestore
by Jay in forum Maya Basics & Newbie Lounge replies 2 on 19-03-2017
VRay and Maya 2014
by skivi in forum Maya Basics & Newbie Lounge replies 3 on 06-04-2014
Vray camera tracking problem
by djwaterman in forum Lighting & Rendering replies 23 on 08-10-2012
Vray 2.0 demo
by ctbram in forum Maya Basics & Newbie Lounge replies 32 on 28-07-2012
strange thing when logging in
by Sil-Valeor in forum Board Questions & Suggestions replies 1 on 06-01-2010
Topics
New tutorial - Create tileable textures from photos. Photoshop to Alchemist to Maya 2
By David
Site News & Announcements
1
Free Courses
Full Courses
VFX News
How computer animation was used 30 years ago to make a Roger Rabbit short
On 2022-07-18 14:30:13
Sneak peek at Houdini 19.5
On 2022-07-18 14:17:59
VFX Breakdown The Man Who Fell To Earth
On 2022-07-15 13:14:36
Resident Evil - Teaser Trailer
On 2022-05-13 13:52:25
New cloud modeling nodes for Bifrost
On 2022-05-02 20:24:13
MPC Showreel 2022
On 2022-04-13 16:02:13