There are two issues on mobile of CSM receiver culling causing shadow receiver to be cull unexpectedly.
There is a video showing this issue in the following UDN thread.
https://udn.unrealengine.com/questions/496262/shadow-disappear-after-rotate-view.html
First one is the ReceiverMatrix's FarDistance too short to reach the receiver mesh. The code is at below
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The Second one is the Shadow ReceiverFrustum and CasterFrustm are coming from the largest split CSM ProjectedShadowInfo. If there are 2 or 3 cascade shadow, the mesh in the small split CSM ProjectedShadowInfo may be culled by the largest split CSM ProjectedShadowInfo.
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1 |
Component | UE - Platform - Mobile |
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Affects Versions | 4.21.2 |
Target Fix | 4.26 |
Created | Apr 27, 2019 |
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Resolved | Jun 12, 2020 |
Updated | Sep 4, 2020 |