From version 12 there are no way to use CoronaLightMaterial with CoronaPattern. Emit light option unsupported, as manual says, and leads to black appearance, that's ok (not). But if this checkbox is unchecked it crashes 3ds max at sec GI stage in Corona 12 and above.
Example:
https://limewire.com/d/W63rV#0dqgUV8EEc
