This is an interesting one, please email support@marmoset.co with example files (.tbscene and meshes) so we can add it to our bug tracking system. Thanks!
They do it for some DRM (example: http://store.steampowered.com/app/9860/ ) but not for everything, I think. @ McGreed - you don't mean irony, you mean sarcasm.
ok, but using this method will generate a lot of unwanted mesh along the way, for example, how do you get rid of these tiny mesh as shown in the screenshot?
In the details panel of the light you're able to change the shape. You can extend the length/radius of a light to replicate the tube lights that are being used there For example: