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Crosswalk 4.0 list of known problems and limitations 
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Softimage - dotXSI & COLLADA 
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* UDEV00237609 - COLLADA: XSI® export material name that contains period causes other applications like Maya®, 3ds Max®, Feeling Viewer and FX Composer to crash
* UDEV00235874 - COLLADA: Crash exporting a cgFX Material not formated for COLLADA
* UDEV00247997 - COLLADA: On import of SketchUp files: Z fighting on every polygon in the 3D view
  * Workaround: Turn ON backface culling in the “Camera Display / Performance” tab. Display > Display Options (All Camera). 
* UDEV00247994 - COLLADA: On import of some Cinema4D files: XSI does not like near clip plane of 0
  * Workaround: Set the imported camera near clip plane to 0.01 manually.
* UDEV00234563 - COLLADA: Wrong base pose with negative scaling on bones
* UDEV00236937 - Maya® -> Crosswalk -> XSI® -> COLLADA: unexpected material name change
* UDEV00236609 - Crosswalk exporter file browser is filtering only *.* 


Softimage - FBX
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* UDEV00237231 - FBX: Import memory leaks
* UDEV00237240 - FBX: Export memory leaks
* UDEV00237249 - FBX: Importer crashes when loading a specific file - Autodesk® library related
* UDEV00236545 - FBX: Command doesn't log file path or any options as argument
* UDEV00252383 - FBX: Material name is not exported properly - the object name is used instead

 
3dsMax - dotXSI
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* UDEV00235552 - 3ds Max® Interop - Freeze at import when when updating with sub materials on same session as export
* UDEV00235838 - Incorrect DotXSI Export result with UVW's W value (from 3ds Max®)

Maya - dotXSI
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* UDEV00237033 - Maya® Interop: constraints in Maya® are not well supported at export
* UDEV00237353 - Texture repeats not imported into Maya® properly
* UDEV00237354 - Symmetric dupe exports badly to Maya®
* UDEV00235628 - Skin / Envelopes made with "rigid Bind" in Maya® are not supported in Crosswalk
* UDEV00236036 - Maya® Interop: Re-link material is not working with cluster materials
* UDEV00236550 - Maya® Interop: Info tab comments column doesn't resize to window size, some comments are cut out
* UDEV00254206 - Maya 2010 - Linux - Envelope skin export issue - Bind pose is wrong when exporting
  * Workaround: Set the character to its rest pose before exporting.