Mirrors

#1 A mirror object can be created by going through the "Manage Entities" window in Constructor. Since there isn't a one step process for creating mirrors you may have to fiddle around with the actual procedure a little bit.

Create your mirror "frame" -- one brush. Create another brush that you place on/intersect with the face that will be the mirror "surface" for your "frame" brush. Manage Entites and create a new one -- make it a mirror surface. Take your mirror "surface" brush and assign it to "other" type in the brush type selector, choose any available option. Go back to "Manage Entities" and correct the fields to point to your mirror entity. Save, export, test your dif in game. There may be a better, quicker method that I overlooked since I only spent 5 minutes to figure it out.

#2 Here is a Constructor file that I created to show people how to create mirrors.

#3 @Michael: can you specify better "Go back to "Manage Entities" and correct the fields to point to your mirror entity" ? Not really clear to me...

@David: tryed to export the mirror file you provided and load it inside T3D with no success...

#4 I do not know if it will work in T3D. You will want to use a reflective shader rather than the regular DIF method.