# How to find visible triangles of a static mesh? **URL:** \ **Category:** Asset Creation\ **Tags:** precomputed-visibili, unreal-engine, UE4, question\ **Created:** [August 7, 2018, 5:46am UTC](https://forums.unrealengine.com/t/how-to-find-visible-triangles-of-a-static-mesh/431121 "2018-08-07T05:46:29Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![anonymous\_user\_c51892cb](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_c51892cb](https://forums.unrealengine.com/u/anonymous_user_c51892cb)\ **Post date:** [August 7, 2018, 5:46am UTC](https://forums.unrealengine.com/t/how-to-find-visible-triangles-of-a-static-mesh/431121/1 "2018-08-07T05:46:29Z")
Hi, I understand how precomputed visibility data is used to do occlusion culling. In that case, it gives the meshes which are visible. I want to know the visible triangle faces in those visible meshes. Once I get the triangles, I can use the normals and the dot product should give tell me whether the triangle is visible or not. My question is how do I get the list of triangles in a static mesh ? I went through the following question: > **[How can I access the triangles of a static mesh?](https://forums.unrealengine.com/questions/62797/how-can-i-access-the-triangles-of-a-static-mesh.html)** > > I’m trying to access the triangles of a static mesh through C++. Is there a way to get them? Cheers I also went through the following post: > **[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... I’m not sure how to use the information though. Is there an array in the static mesh class which stores the triangle information ? Thanks.