Fogscreen (Community Challenge)

Get feedback from others on your works in progress
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OnoSendai
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Re: Fogscreen (Community Challenge)

Post by OnoSendai » Mon Oct 26, 2009 4:12 pm

Well.. I'm not completely sure how film projectors work, but if they rely on light passing through the film without being scattered, then that won't work in Indigo right now.

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psor
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Re: Fogscreen (Community Challenge)

Post by psor » Mon Oct 26, 2009 4:21 pm

What will happen when I'd blend a diffuse material with a null material. The diffuse would
contain the image I wanna project and it would be lit with the technique I did post in the
beginning of this thread (projector link). Would that scatter the light too?



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OnoSendai
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Re: Fogscreen (Community Challenge)

Post by OnoSendai » Mon Oct 26, 2009 4:22 pm

The diffuse material will scatter the light, yes.

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psor
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Re: Fogscreen (Community Challenge)

Post by psor » Mon Oct 26, 2009 4:30 pm

Ok. In theory, if I could give a medium a texture and the medium would have an IOR of 1.0
and has absorption too, then it would work. Do I understand that right? :D ;)



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OnoSendai
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Re: Fogscreen (Community Challenge)

Post by OnoSendai » Mon Oct 26, 2009 4:52 pm

Yup, although IOR > 1 is fine too.

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Re: Fogscreen (Community Challenge)

Post by psor » Mon Oct 26, 2009 5:00 pm

Ok, thanks now get busy! :mrgreen: :wink:

j/k




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Re: Fogscreen (Community Challenge)

Post by CTZn » Wed Oct 28, 2009 3:48 am

Ono, that specular-based, film material is an interesting idea wich I don't want to discard because it goes straight to the point, but how about expanding diffuse_transmitter with a scalar, phong(-ish) lobe ? We discussed that already... That would be a phong_transmitter maybe ?

Even though d_t is "not physical" it has proven to be very usefull, and imho that extra lobe would add versatility and relevance, ?

But again an ideal film has no scattering at all (~= infinite phong exponent) so the texture lookup trick on specular might fit best here.
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OnoSendai
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Re: Fogscreen (Community Challenge)

Post by OnoSendai » Wed Oct 28, 2009 10:01 am

Actually, after some more thought, and seeing that Enrico wants a similar material for stained glass, I think I'll augment the specular and glossy-transparent materials with a new parameter called 'absorption layer transmittance', which basically allows you to set the colour of an absorbing coating over a specular or glossy transparent material.

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Re: Fogscreen (Community Challenge)

Post by fused » Wed Oct 28, 2009 11:11 pm

thats just great, ive been waiting for this for ages :)

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