I’ve been working on a test map for a very long time, and a long time ago the GPU particles stopped colliding with the world. Yes, I understand how they’re supposed to work (using the scene depth visible from the camera), but even with a clear floor, the particles still won’t collide and they’ll just fall right through. What’s really interesting though is I noticed sometimes the geometry in Cascade seems to collide just fine. But as soon as you put that particle in the world, it fails.
If anyone has a status update on UE-14658, I’d like to know. That bug was reported by another user who had the same exact issue.
UE-14658 is currently being worked on by our engineers, specifically the bug resolves around an added Blueprint component causing the collision to function incorrectly. As we work toward a solution to this issue, a work around would be to keep GPU particles separate from other components in BPs. While not ideal, it would allow for the collision that you need for the GPU particles.
I had removed all of the particles from my Blueprints, but they still do not work in the level. Even as a particle emitter, the GPU collisions still fail. Should I open a new map or migrate the project? I really don’t want to lose all the programming I’ve done over the last year.
Hey, I upgraded my project to UE4.10, and the problem was fixed! I got the idea from that comment you sent, I guess you may have edited it out. But it worked!