Vista - Multiple light sources

I am trying to do the following: I need to apply ambient lighting to one
mesh, while at the same time applying directional lighting to another,
without the light sources influencing their respective meshes. Is there any
way of doing this in avalon?


Thanks in advance,
Pedro A. Rico

Sorry, I meant without having each light source influence any meshes other
than the one it was intended for.

"Pedro A. Rico" wrote:

> I am trying to do the following: I need to apply ambient lighting to one
> mesh, while at the same time applying directional lighting to another,
> without the light sources influencing their respective meshes. Is there any
> way of doing this in avalon?
>
>
> Thanks in advance,
> Pedro A. Rico

You can't restrict a light to specific meshes. The general solution would be
to create two ovelapping Viewport3Ds. One with one mesh, one with the other.

Given the specific scene you described below, there would be another way.
Instead of having an AmbientLight, use an EmissiveMaterial with the same
color as the AmbientLight on the "ambient mesh." Caveat: EmissiveMaterials
are "transparent" because they don't write to the depth buffer so if you
have something in front or behind it make a MaterialGroup that includes a
compeletly transparent DiffuseMaterial in addition to the EmissiveMaterial.
This way your "ambient mesh" will look like it has ambient lighting and it
will not be affected by the DirectionalLight.

(If you had a PointLight instead of a DirectionalLight you may be able to
set the Range so that only the mesh you want is hit by the light.)

Jordan

> Sorry, I meant without having each light source influence any meshes other
> than the one it was intended for.
>
> "Pedro A. Rico" wrote:
>
>> I am trying to do the following: I need to apply ambient lighting to one
>> mesh, while at the same time applying directional lighting to another,
>> without the light sources influencing their respective meshes. Is there
>> any
>> way of doing this in avalon?
>>
>>
>> Thanks in advance,
>> Pedro A. Rico