Path Tracer niagara error

Development Rendering
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1

Hi everyone, I need some help.

When I enable Path Tracer, niagara translator cannot block the fog effect in the distance

How should I handle it

BBB
BBB1389×1026 467 KB

AAA
AAA1449×1011 470 KB

2
  1. How is the fog effect implemented? Mesh, emitter, card, skybox?
  2. What’s the fog’s material setting and shading model?
  3. Are you using substrate?