UE5 NvRTX Volumetrics

Gaming and Visualization Technologies Engines Unreal
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Hi,

In my current UE5 (NvRTX) project, volumetrics are visible both with Lumen and with the regular Path Tracer, but when I switch to RTXGI PT, all volumetrics disappear.

My questions are:

  1. Does RTXGI PT currently support Heterogeneous Volumes (Sparse Volume Texture / VDB)?

  2. Does RTXGI PT support Volumetric Clouds in UE5?

  3. If not, is there any recommended way to get a similar volumetric look when using Lumen + RTXGI (settings, workarounds, or alternative volumetric setup)?

I’m not concerned about performance – I’m aiming for the most cinematic result possible. However, I can’t reliably use the classic Path Tracer for final rendering, because the memory grid fills up very quickly, making it unusable for my production scenes.

Thanks.