We've noticed a number of shader compile errors when attempting to use GFur for an XR project with Instanced Stereo enabled.
Apparently the FVertexFactoryInput struct(s) for GFur do not contain an 'InstanceId' to indicate the left or right eye.
This could be a serious hindrance to performance in XR if we are unable to use Instanced Stereo.
Please see the following log file showing the relevant shader compile errors.
p434gfurShaders.log