@vice39 Hi there! Have you added any effects from UVFX to your game around where it crashes? Or is it just that having the asset imported crashes your build, too? Both sound like Unity issues, but I know these are there with 5.5.0f3. 5.5.0p3 fixed several issues with particles and crashes so you may want to check the release logs for that here: - https://unity3d.com/unity/qa/patch-releases?version=5.5 Patch 4 has also been since released.