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Path Tracing with Post Process Volume is restricted

Hi!
I’m very new here and to Unreal Engine. Came from SketchUp and Blender, curious about rendering capabilities of UE.
I started testing Path Tracing method available from Post Process Volume, but it turns out that the Max Bounces parameter is limited to the value of 50, with default being 32. At 50 bounces the image is still veeery noisy, so I wanted to bump up bounces, but I can’t. Can I somehow exceed that limit? Why is it so low?
I use UE 4.26 on GTX 1070. It’s not an RTX, I know, but it does support RTX on UE.