I have come across an issue with collision of static meshes when instanced in a blueprint.
When I use an “instanced static mesh” component in the BP component editor and attach a static mesh (that already has collision) to it for instancing, the collision geometry does not seem to have any effect when playtesting (also it does not show up as colored when visualizing player collisions in the viewport).
Investigating a bit further, I noticed strange “invisible” walls (pawn collisions with ‘nothing’) in the level.
So my assumption is that the collision boundaries get displaced from the actual geometry when using instanced meshes in a blueprint.
I can replicate this behaviour through multiple blueprints.
Cheers,
Michael
PS: Im on Windows 7 / UE 4.1.1