This 3D model has custom collision for unreal engine 4
**Tutorial : [Unreal Engine 4 - Build Simple Dynamic Stairs Using Instanced Static Mesh Blueprint](https://anasrar.github.io/blog/post/simple-dynamic-stairs-instanced-static-mesh)**
**Result**
![Build Simple Dynamic Stairs Using Instanced Static Mesh Blueprint](https://anasrar.github.io/blog/assets/images/unreal-engine-4-build-simple-dynamic-stairs-using-instanced-static-mesh-blueprint.png)
*UE4 Blueprint*
![Build Simple Dynamic Stairs Using Instanced Static Mesh Blueprint](https://anasrar.github.io/blog/assets/images/unreal-engine-4-build-simple-dynamic-stairs-using-instanced-static-mesh-blueprint-5.png)