Problem with emitter

[danvica]

I was playing a little with lights and I found a problem assigning the same emitting material to a different object (see pictures).

In the first picture I link the inner front cube to an emitting material but nothing happens. The same material applied to the inner back cube works (picture 2).

I'm still with 2.46b.

Any idea ?

Daniele

[steveps3]

Normals?

[abstrax]

I guess, Steveps3 is right: The normals of the front cube probably point inwards and with that the light is emitted into the cube where you can't see it.

Cheers,
Marcus

[FamilyGuy]

Is there any chance that you can add "revers normal button" in emitter materials?

[steveps3]

But the problem doesn't just lie with emitters. If you get the normals wrong for anything then you will get "odd" results. So the problem lies with the modelling, not the rendering.

[danvica]

Thanks for the help... normals matter but in a strange way.

The normals were ok but when I tested them pointing inwards well... see the pictures... the wrong direction works...

Am I doing some stupid error ?