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 16-04-2013, 08:58 AM
Connor Lee
Registered User
Join Date: Oct 2012
Posts: 15

Problems Rendering Volume Lights in Mental Ray

I created a small volume light shining inward to provide a low-visibility view on a character traveling through a cave, but whenever I try to render it in a sample frame, I get this message: Warning: file: C:/Program Files/Autodesk/Maya2013/mentalray/scripts/mentalrayUI.mel line 182: (Mayatomr.Script): more than one mentalray globals node found, using just the first Simple_Model:mentalrayGlobals //
I thought the light wasn't working, as the preview when I turned on, "Use all lights," showed pitch black, yet when I tried to import a torch I had from an old scene that used another volume light to generate a similar effect, the loading caused me to see for a split second that the light and its effects WERE present. I'm not entirely sure where to go at this point, so I come to you guys for help.
Thanks,
-Connor

# 2 16-04-2013, 09:10 AM
Connor Lee
Registered User
Join Date: Oct 2012
Posts: 15
Please, this is incredibly problematic and I can't continue until it is resolved. I need to know how to change this problem. :/

# 3 16-04-2013, 11:43 AM
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David
SM Site Programmer
Join Date: Apr 2002
Location: Prague
Posts: 3,183
try exporting all your geo to a new scene sounds like something has gone wrong with mr might be easier than trying to fix it

Dave


From a readers' Q and A column in TV GUIDE: "If we get involved in a nuclear war, would the electromagnetic pulses from exploding bombs damage my videotapes?"
# 4 16-04-2013, 02:43 PM
Connor Lee
Registered User
Join Date: Oct 2012
Posts: 15
Thank you David. That worked and I was able to finish my scene, but now I've come upon another problem. I'm trying to batch render, yet no frames are being produced. I fiddled around with diagnostics and here's what I found:
- This scene contains nodes with animated visibility, this requires Optimize Non-animated Display Visibility to be turned off.
- Node Scene_2___Falling:Mesh has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle19 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:joint16 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:joint8 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:joint5 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle17 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle9 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle10 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle13 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle16 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:ikHandle3 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:ikHandle5 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:joint1 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:joint4 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle22 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle20 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle21 has animated visibility.
- Node Scene_2___Falling:volumeLight1 has animated visibility.
// Warning: file: C:/Program Files/Autodesk/Maya2013/mentalray/scripts/mentalrayDiagnostic.mel line 524: 18 warnings, see script editor for details. //
RenderDiagnostics;
MENTAL RAY RENDER DIAGNOSTICS:
Miscellaneous
- This scene contains nodes with animated visibility, this requires Optimize Non-animated Display Visibility to be turned off.
- Node Scene_2___Falling:Mesh has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle19 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:joint16 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:joint8 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:joint5 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle17 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle9 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle10 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle13 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle16 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:ikHandle3 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:ikHandle5 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:joint1 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:joint4 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle22 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle20 has animated visibility.
- Node Scene_2___Falling:Advanced_Model:nurbsCircle21 has animated visibility.
- Node Scene_2___Falling:volumeLight1 has animated visibility.
// Warning: file: C:/Program Files/Autodesk/Maya2013/mentalray/scripts/mentalrayDiagnostic.mel line 524: 18 warnings, see script editor for details. //
unifiedRenderGlobalsWindow;
I'm not entirely sure what this means or how to fix it, but all I can see at this point is a message saying, "// Rendering with mental ray... //" and nothing more. Shouldn't it be showing what images are being rendered and what % of them are finished? I was hoping to render while I was out today, but then Maya gave me this issue. Help please? Thank you
-Connor

 
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