Only every 2nd frame has motion blur in Vray Next

[mazi710]

Using Max 2019, Vray Next, TyFlow 0.16012.

Rendering with motion blur with vray only renders every 2nd frame with motion blur, and every other frame without. When it does render with motion blur it looks like it's supposed to but it just turns off completely for every other frame. It's a basic particle sim with the particles converting to mesh. Maybe the setup is wrong but i don't think so? I have tried both just rendering without running the sim first, and then running the entire sim to the end of the timeline so it's cached and then rendering, same result.

Flow: https://imgur.com/yDu4WtJ

Result: https://gfycat.com/HelpfulEcstaticEmeraldtreeskink

[tyFlow]

Set Mesh to 'instances' if you're using VRay (although they're not supoorted in VR NEXT GPU...only CPU).

You're emitting 0.5 per frame, which means every other frame the topology changes. Changing topology = bad moblur in mesh mode