We are using BSP for our levels and have physics objects that should make a sound when they collide with other objects . This works with static meshes , but collision does not register on BSP surface . I have tried adding a blocking volume on top which provides inconsistent results because there are two collisions happening at same time . If there was a way to turn collisions of for BSP results would be a lot more consistent.
That said , ideal solution would be if there was a way to get collision to register on a BSP surface , but as yet nobody has been able to say if that is possible .
What’s your collision set to? Do you have simulation and generate overlap events checked with your physics objects? What about collision presets? Are they set properly? Test different presets or set up a custom one. See if that fixes problem.
BSP brushes work great for laying out a level and testing basic collision, and allow level designers to build something before level artists are involved. They do not, however, have full lighting and collision support and your options for manipulating settings for BSP geometry is limited. You’ll most likely need to replace brushes you create with Static Meshes.
UE4 does allow you to create Static Meshes from brushes, however, and that may be easiest solution for you. In Details panel with your brush selected, expand Brush Settings and you’ll see a Create Static Mesh button. Once that is created, you can open new Mesh in Mesh editor and give it collision via Collision drop down. From then on, you’ll have full control of collision options for Mesh.
If you would rather use an overlapping volume as a trigger for sound effects, you can just pull it out a bit so it sits in front of BSP, and that should resolve any overlap issues.
There’s some great information on BSP brushes here: