NVRTX 5.4 Caustic Masked Material No caustic shadow occlusion

Gaming and Visualization Technologies Engines Unreal
1

The default material has caustic shadow occlusion. The masked material loses caustic shadow occlusion!
How to solve the problem!

No caustic shadow occlusion01
No caustic shadow occlusion011920×1044 127 KB

No caustic shadow occlusion02
No caustic shadow occlusion021920×1044 169 KB