The new Unified Sampling mode in Maya 2014 is set by default and doesn't work with mental ray Contour rendering. In order to get the mental ray Contour rendering to work, set the Sampling Mode in the Quality tab of the Render Settings to "Legacy Sampling Mode".
Some mental ray materials are now classified as “Legacy
Materials” in Maya 2014. Unfortunately, there is an issue where these materials
will not appear with swatches or shading groups. Here is a list of the
To work around this issue, download the attached
“mentalrayCustomNodeClass.mel” file and copy it into
mentalrayForMaya2014/scripts. This will revert the mental ray material
classifications to their Maya 2013-state.
Running Maya in debug mode and sending a stack trace can help Autodesk troubleshoot some crashes. Maya uses GNU Debugger (usually called GDB), which when activated, lists every procedure happening within Maya. This information can then be sent to Autodesk to aid in further troubleshooting.
Note: a Linux terminal must be used to run Maya in this mode.
1. In a terminal go to the directory where Maya is installed, typically "cd /usr/autodesk/maya2009-x64/bin" 2. Run Maya under GDB. Type in "./maya -d gdb"
3. This will launch GDB and load the maya.bin file (GDB itself does not have a UI).
4. Once GDB loads you will get a prompt. You will now need to launch Maya using one of the two options below:
"r" (for example, will run Maya in GUI mode)
"r -prompt" (for example, command line parameter to Maya of -prompt will run in prompt mode)
5. If Maya crashes you will come back to the GDB prompt in the terminal.
6. To get stack trace you will need to do the following:
1. Type "bt" to get stack trace details. 2. Type "threads #" to switch to a specific thread number. These can range between a variety of numbers. Start at 1 and go up from there until "bt" does not show any more details.
The information printed out in the terminal should be copied and pasted into an email and sent to Product Support through your service request.
Here is a small video showing a workaround to getting the eye dropper tool to pick a color outside of the Maya UI.
In short, if you wish to skip the video you can simply accomplish color picking outside of the UI by selecting the eye drop tool and left mouse click hold and move the mouse over to the color you wish to pick and release the mouse button.
To avoid confusion from those of us using non Windows operating systems, I wanted to post the important note on the Maya 2013 Help Documentation in regards to the DirectX plug-in avialable in the Maya 2013 Extension.
Important: To use the DirectX
rendering engine, you must use Windows 64-bit and a DirectX 11 compatible
If you plan to borrow Maya using this universal method that works with most Autodesk products: About Maya > Product Information > Borrow License, you will notice that you will not be able to render a file using mental ray.
Maya 2013 Service Pack 2 and Maya 2013 Extension have been released
Autodesk has released both Maya 2013 Service Pack 2 and Extension. All users can download the service patch from the public site while Subscription customers have access to the Extension via subscription center.