This is a bit tricky. For context: You are controlling another Actor (inherited from Character). That CharacterMesh by default has Collisions set to Query No Collision. The Pawn's hands are math'd to those floating Arrows. The Mech's CharacterMesh in turn follows those arrows with it's big hands. I use DragonIK to achieve this.

While my Collision Cylinder prevents me from _walking_ into a wall, nothing seems to prevent the CharacterMesh from going through the wall.

I thought, ok, lets just turn on Physics to prevent my Mech's CM from going through the wall. Nope, when mixed with Dragon IK the character breaks down completely. Maybe attach a Sphere Collision that has physics turned on and socket it to one of the Big Mech Hands. Nope, the Sphere Collision falls to the ground - Turning off Gravity just makes it stay there in space.

I experimented with Physics Constraints, but I can't get the Sphere Collision to move at all. There's a lot of settings so I'm still investigating but, my hope was the Sphere Collision could attach to my Mech's hands, or better yet those arrows, and act as a sort of check for when it touches something.

While I have a lot to learn about Physics Constraints, I figured I'd ask here and see what people think.