Material Mask Opacity is not working in PIE, but works as expected in Standalone.
Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 4862710, and 4.23 CL# 4898645
The larger cube that is updating the the material parameter collection via the construction script, will not correctly mask the smaller cube via a sphere mask in pie correctly. This works as expected in standalone
The larger cube would mask the moving smaller cube properly in both PIE and Standalone
This works properly when the larger cubes logic in the construction script is moved to the Event Graph. This also will work if you spawn the larger cube on begin play.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-69616 in the post.