VRaySoftBox does not work properly with Mesh Light.
Confirmed with V-Ray Next, Update 3.1
Best wishes,
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Yuji Yamauchi
OakCorp Support
Thanks for the report. We are aware of the issue (Bug-tracker id: VMAX-3468 ), I’ll bump its priority additionally. As a workaround, you may bake the VRaySoftbox via the “Render Map” option and use that instead.
Thank you for the information.
Best wishes,
-------
Yuji Yamauchi
OakCorp Support