# Best way to do hollow collisions? **URL:** \ **Category:** World Creation\ **Tags:** Blender, unreal-engine, Collision, UE4, question\ **Created:** [July 13, 2015, 7:00am UTC](https://forums.unrealengine.com/t/best-way-to-do-hollow-collisions/325053 "2015-07-13T07:00:28Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![anonymous\_user\_2ed5b4c7](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_2ed5b4c7](https://forums.unrealengine.com/u/anonymous_user_2ed5b4c7)\ **Post date:** [July 13, 2015, 10:02am UTC](https://forums.unrealengine.com/t/best-way-to-do-hollow-collisions/325053/2 "2015-07-13T10:02:06Z")
HI! It does not matter what kind of 3D software you use. You need remember some basic rules. 1. Collision mesh can be only closed mesh - sphere, box, cylinder, cone. But tube or similar not acceptable. 2. For complex meshes, you can use group of collision meshes. 3. Collision meshes should be in scene Root and do not grouped and not parented. > **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)** > > After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — https://unrealcommunity.wiki/! You will be able to find content from... > **[FBX Static Mesh Pipeline](https://docs.unrealengine.com/5.1/en-US/fbx-static-mesh-pipeline-in-unreal-engine/)** > > Setting up, exporting, and importing Static Meshes using the FBX content pipeline. This video for 3DS MAX, but rules is valid for all 3d programs: [Unreal 4 Creating Custom Collision (for concave surfaces) - YouTube](https://www.youtube.com/watch?v=Gy1ZBp_OTVo) --- _[View the full topic](https://forums.unrealengine.com/t/best-way-to-do-hollow-collisions/325053)._