Release Notes

mental ray for Maya rendering limitations

This section contains information about the unsupported features, software limitations and workarounds, as well as some tips for this version of mental ray for Maya.

Unsupported features

Rapid scanline rendering does not support the following features:

mental ray for Maya does not support the following Maya rendering features:

Known limitations

The following lists the software limitations and workarounds for this version of mental ray for Maya.

Depth map shadow quality with Rapid scanline rendering

Workaround

Advanced filtering and file textures

Workaround

Custom mental ray shaders and importing or referencing from Maya 5.0 to Maya 6.x

Workaround

Using Maya Batch Renderer

Maya's environment shaders do not work well with IBL

A node cycle detection prevents endless loops and crashes when translating DG graphs

mental ray in Maya 6.5 won't render subdivision surfaces with non-quads in base mesh

Workaround

Partial creases rendering as full creases

Bump mapping and custom mental ray shaders

Workaround

Depth map shadows and particle rendering

Workaround

mental ray for Maya ignores the keyframe animation for the visibility attribute

Workaround

Directional light does not work well with Photons

Workaround

Use a point or spot light instead. Warning messages appear when importing scene files in Hypershade

// Warning: 'Draft.message' is already connected to 'mentalrayItemsList.options'. // 

mental ray for Maya doesn't export the necessary include and link statements in the mi file

Workaround

base.mi contour.mi physics.mi

base.so contour.so physics.so

Tearing off mental ray for Maya Render menu may crash Maya

Workaround

mental ray for Maya crashes or won't load when a firewall is active

Workaround

Old scenes using mental ray shaders can render differently

Workaround

Missing Motion Blur

Errors Caused by Certain Shading Network Connections

Limitation

API  0.0  error  301040: "maya_checker" has no member "color1"
API  0.0  warn   302018: type conflict: "color" is type color, "maya_checker" returns type struct

Workaround

Custom Text Does Not Work for Interactive Renders

Unsupported File Texture Formats

Workaround

imf_copy -p <filename>.rgb <filename>.map

3D Paint issues with mental ray for Maya

Workaround

NURBS surface texture warp fix not supported

Workaround

Missing bump/displacement maps when using File Texture nodes with mental ray

Workaround

Layered Shader not Supported for Global Illumination/Caustics

Workaround

Limited Support for Certain Shading Network Connections

// Warning: (Mayatomr.Nodes) : Unsupported type of connection: checker1, current plug value used instead //

Workaround

Tips

Rendering Color and Z-depth

Depth map shadow settings and volumes (like light fog)