[Radiance-general] clipping planes exposing object interiors?

[Paul LaBerge]

Hello colleagues,
In creating renderings of a room and its lightshelves with a fore 
clipping plane it appears that the clipping plane is exposing the wall 
interior in such a way that it becomes rendered. Is this the way 
clipping planes operate?
If so, it suggests that the rendering is created after the clipping 
plane is applied and therefore doesn’t include objects that are between 
the viewpoint and the fore clipping plane.

This can be seen where the ceiling meets the wall and where the floor 
meets the wall in the perspective image.  (-ab 2 -ad 1000 -av  .368 
.368 .368 -as 500 -ar 500 -aa .15 -dj .03)

The parallel view is also created with a clipping plane that seems to 
expose the wall interior, the scalloped isoline at the top of the 
image. (-ab 2 -ad 500 -av .37 .37 .37)

Images:
http://www.labergedaylight.com/pages/temp.html

Best regards,
Paul LaBerge