Le 17-11-09 à 01:40, Kenneth a écrit :
> "Kenneth" <kdw### [at] gmailcom> wrote:
> 
>>
>> You almost had it: Light_group of object and light_source, ALONG WITH
>> no_shadow for the wall.
>>
> 
> Hmm, for your real scene, I think there is still a problem: How to get your wall
> to cast its own shadows from other lights in the scene. With my test set-up, it
> doesn't do that, as the wall is necessarily made no_shadow in order to work
> correctly :-/
> 
> I tried adding an identical NO_IMAGE wall into the light_group (without the
> no_shadow tag), but that doesn't work-- this extra wall again blocks the light
> to the sphere object.
> 
> My past use of this set-up never needed the 'wall object' to cast its own shadow
> (I was shining a light up through a no_shadow height_field.) I wish I could
> suggest a workable solution...
> 
> 

Any object in a light_group will always cast shadows for any light in 
the scene. The light in the light_group can also get shadowed by any 
object outside the light_group.

The light(s) in a light_group can only illuminate objects that are part 
of the same light_group.
The objects of the group don't receive illumination from lights outside 
of the group unless you add "global_lights on" to the group.

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