View Full Version : Radiosity conundrum

01-16-2008, 05:27 AM
I am creating an architectural scene in which i have a reflection sphere around a glass cube (see attached please) The sphere is not casting receiving or self shadowing, surface texture is 100% lum. I have the object unseen by camera and ignored by the radiosity solution. Can anybody explain why the sphere 'darkens' everything within it and how to remedy this problem?

01-16-2008, 05:38 AM
No idea - but have you tried turning off Directional Rays in radiosity settings? No idea if that would make any difference though :/ Guess you can't use Image World or Textured Environment as a Backdrop instead?

Captain Obvious
01-16-2008, 06:55 AM
Make the sphere big enough to cover your entire scene.

01-16-2008, 07:02 AM
kopperdrake - I need to control reflection size by adjusting sphere size, cant do that in spherical mapping etc.

Captain - obviously that did occur to me but then the sphere casts its darkness over the entire scene, not good!

Captain Obvious
01-16-2008, 07:41 AM
Create a clip map for the sky in the dome, so you're only using the trees and stuff.

01-16-2008, 08:16 AM
Have you set it so it is ignored by all lights too?

01-18-2008, 07:21 PM
i think your sphere should be enclosing everything. the shadow is, i believe coming from the building. try shifting your light position

01-18-2008, 07:34 PM
The shadow does look like it might be coming from the building - at one point the shadow appears to have an edge that doesn't look like it follows the poly lines of the sphere object.

If that isn't the issue, have you turned off "seen by radiosity" for the sphere?

01-19-2008, 01:48 AM
Just make the sphere "Unseen by Rays".

01-19-2008, 02:54 AM
Just make the sphere "Unseen by Rays".

hehehe, then you might as well remove it completely because the sphere was put there for the reflections in the glass.

why don't you use the spherical reflection map you can set in the surface panel instead of the sphere ?

01-19-2008, 11:41 AM
Well, he just asked how to get away the shadows from the sphere, you can't have all ;)