Need the name of a mod

[JTeam1]

I have been watching EJ and Das and I believe they have a mod that lets them look inside parts when they are building.  What is the name of that mod?

[Gaarst]

As far as I know, Das doesn't use any mods of this sort. The closest thing I can think of is Collide-O-Scope which allows you to see parts colliders. Otherwise, you can clip the camera through parts to be able to see through them, no mod needed here.

[JTeam1]

How would you clip the camera in order to see through them?

 

[Snark]

17 hours ago, JTeam1 said:

How would you clip the camera in order to see through them?

Just zoom in, and/or change the camera angle.  When you zoom/rotate far enough that the camera is physically inside the part, then the part vanishes, since the surface meshes of KSP objects are only visible from one side.  Get inside them and they're invisible (unless it's a part that's designed to have an inner surface as well as an outer one, such as a cargo bay).