Render mask with Phoenix Sim only not working

[GregCooper]

Might be more for the V-Ray team, but if I try to render a phoenix sim with the render mask (only the phoenix sim is in the render mask set) I get an error saying there's nothing in the render mask set and it tries to render the scene without the render mask active. If I have one other object selected this works so currently as a workaround I'm adding a random off-screen object to the render mask to make this render correctly. Strange behaviour

Using Maya 2022.1

[georgi.zhekov]

Hey Greg,

how about if you switch the render mode to Volumetric Geometry?