Help With A Light Fixture.

[rlackore]

Caveat: the Raytrace images posted in this discussion are crappy because my comp is old and slow and I'm impatient.

 

As an exercise to try to understand lighting in Chief I created a room and plopped in a light fixture from the Chief bonus catalog: Pendant Lighting>Glass Jar Pendant 01. I copied it twice and threw in some base cabinets for context. Here is the floor camera Standard view:

 

 

Then I threw a Raytrace: Uniform Intensity=0; Direct Sunlight=0; Use Photon Mapping=Yes. I get a completely black scene with three light bulbs that show up only because their material is Emissive:

 

 

The Light Data for the lights is: Point Light, 1200 Lumens (75W). All three lights are turned on in the scene, yet I get no illumination from any of them. If I dial up a bit of Uniform Intensity or use Ambient Occlusion, it's still clear that no illumination is coming from the fixtures:

 

 

So I moved the Light Source on the middle fixture down below the physical geometry of the model:

 

 

Now I get illumination from the middle fixture:

 

 

Why is this? The fixture tube (shade, whatever you want to call it) is defined as Transparent Crown Glass. Why won't the light source shine through? So I moved the middle fixture's light source back to it's original position and changed the material of the tubes to a fully transparent General material:

 

 

Then threw another Raytrace:

 

 

...and I'm right back to where I started - three 75 watt Emissive light bulbs hanging in the air. Plan is attached if anyone cares to take a stab at figuring it out.

 

Lights.plan

[Dennis_Gavin]

Hmmmm.  I get the same thing.  Doesn't seem right to me.  Using X7 FYI.