by face_off » Tue Sep 17, 2013 12:51 am
face_off
Tue Sep 17, 2013 12:51 am
IMO = "In my opinion"
There is a portal tutorial in the resources forum here.
For Revit, if you were going to use a portal, I /think/ you would have a plain with a glass window, then set the material type of the glass in that window to "portal". But I think (and there are people here with far more expertise in this area than me), you are better off leaving the glass material as specular with "fake_shadows" on, and reduce the opacity (or increase the kernel indirect light importance) if the lighting coming through the glass is causing too much graininess.
I'm not certain, but I suspect the "fake_shadows" pin in the specular material makes the portal material less commonly used - but hopefully people with more knowledge than I on this may comment.
Paul