Instanced static mesh?

I’m looking for information on what the difference is between a “static mesh actor” and an “instanced static mesh.” I’ve tried googling but can’t really find any details on instanced static mesh. I’d like to know when it’s best to use each one and why.

Thanks!

When you load a mesh, it’s called a “draw call”. Each mesh take one drawcall, and if you multiply one mesh by 100, it will cost you 100 unique drawcalls. If you use a instanced static mesh, it will process only one drawcall for the mesh, and the only apply the matrix of transformation.

additionnal informations here :

Perfect, thanks!