T3D 1.1 Final - more than 1 object with same cubemap render bug? - LOGGED (THREED-2488)

Build: Torque 3D 1.1 (1.0 is affected too)

Platform: Win32

Target: GFX/Cubemap

Real problem: Cubemaps and Instancing are not compatible with each other.

Issues:
1. At some angles, while both shapes in view, the cubemap "resets" when you "looking around" (the first 10 seconds of the video).
2. Two TSStatics with same material (with cubemap enabled) are somehow affecting each other (the rest of the video).

Video:


Steps to Repeat:
Start empty template, drop [meshes]art/shapes/rocks/boulder.dts, switch to Material Editor, set Cubemap to something like "NewLevelSkyCubemap" (which I used for screenshots).
Now, copy the TSStatic and fly around.

Suggested Fix:
No real fix yet, but workaround exists:

The quick-fix (workaround) is:
In processesShaderMaterial.cpp
inside void ProcessedShaderMaterial::_determineFeatures
Before this for loop:

...//skipped
   // Allow features to add themselves.
   for ( U32 i = 0; i < FEATUREMGR->getFeatureCount(); i++ )
...//skipped

Add:

if(fd.features.hasFeature( MFT_CubeMap) && fd.features.hasFeature( MFT_UseInstancing ) )
   fd.features.removeFeature( MFT_UseInstancing );