VRayMultiSubTex texture switch viewport display

Hello, we are desperately trying to find a workaround for the lack of viewport display for VRayMultiSubTex when it’s used as a texture switch. Does anyone have a suggestion for this? This functionality is in the VRaySwitchMtl. Would it be possible to use the SwitchMtl as a texture switch and still have it render?

Thank you!
dave

I can’t figure out a workaround. I did log the issue (internal bug-tracker id: VMAYA-11740), however.