Double sided normal for meshlight

[Jambert]

Ono, would be nice to enable double sided normal on emiting material. Could be something enable or desable in exporter. For quite complex emiting mesh, the inside is dark and sometime it's realy hard to model . What do you think about it?

thanks

[benn]

Can you give an example of when it's too hard to create a double sided mesh?

[Jambert]

Monkey with 2 subsurfs, it's a quite complex mesh. The inside is darkish when normal has one side.

thx

[benn]

I just had a talk with nick about it and he says it is something reasonable to add to Indigo at some point. The problem is that there is a lot of code around how the materials emit light and it would take a lot of work to make the light emit in both directions in a configurable way. If we did the quick hack of making all materials emit in both directions, then it would half the speed of rendering since all area lights would shoot rays off in both directions (away from the scene AND into the scene).

So - short answer - yes, we are going to do it, but it won't be soon.

As a solution for now - does anyone know how someone would create a two sided suzanne mesh? You can't just scale it down because it's a concave shape.

[Jambert]

No problem and thx for explanation.

I no longer need it, it just it could be useful sometimes

[Borgleader]

Stupid guess: Supperpose the mesh and flip normals on one of them?

[Jambert]

Stupid guess: Supperpose the mesh and flip normals on one of them?

I thaught it doesn't work and I didn't test

Thanks

[Jambert]

Not so stupid in fact, your way Borg doesn't work with blended emitter using gradient map

(I did make test that's why I tried to model suzanne)