this is probably impossible with or without the source code but

[bunnylions]

Something cool would be a "mirror" effect on meshes/presets, for example if your non-mirror character faces toward a mirror mesh you would see your character's reflection. If the mesh is flat then the reflection is normal, if the mesh is not flat then the reflection is warped.

[Kuri]

i tried using the water reflect to produce a mirror but it only mirrored things in a vertical axis.  This made things look very strange.  When it was exported as an object it failed to appear reflective at all.

It may be possible though, to add a reflection program much like the water reflection one, inside the normal file folders.  The reflection is then specified in the object material and behold, it may just work.

[Kerriki]

Moving this to the game ideas board