Page 1 of 1

Shadeless materials

Posted: Sat Aug 14, 2010 10:42 am
by ionee
Hi there, im working on a project and iv gotten myself stuck trying to find how to have shadeless maeterials, is there a button or a tick box anywhere??
tia

Re: Shadeless materials

Posted: Sun Aug 15, 2010 3:20 am
by DayVids
ionee wrote:Hi there, im working on a project and iv gotten myself stuck trying to find how to have shadeless maeterials, is there a button or a tick box anywhere??
tia

Pretty sure, you can't do that on a pathtracing render, might have some way of doing it in the Direct Lighting method, but can't say for sure.

Re: Shadeless materials

Posted: Sun Aug 15, 2010 3:52 pm
by radiance
can you explain what you mean with shadeless materials ?

Radiance

Re: Shadeless materials

Posted: Mon Aug 16, 2010 6:57 pm
by Daniel
Something that doesn't reflect light or it surroundings. Basically, it has no shadows. For example, a black shadeless sphere would just look like a black 2D circle.
On that note, is it possible to have an object which you can see there, but doesn't affect its surroundings? i.e. Doesn't cast shadows and doesn't show up in reflections.

Re: Shadeless materials

Posted: Tue Aug 17, 2010 5:56 pm
by DayVids
don't think you're going to see the ability to have something in there that doesn't cast shadows, etc.. (at least in ver. 1), but I don't work for these guys, so what do I know :P .

If you use Direct Lighting instead of pathtracing, you can use texture emission materials to make your material a specific color and it will be producing that color so it won't be shaded at all. but since it's direct lighting, as long as you keep the emitting object a little way away from things, it shouldn't really cast light onto other things much either.

Won't work in pathtracing through since that's a physically correct renderer, and the light will bounce a lot more etc... :).

Hope that helps.

Dave

Re: Shadeless materials

Posted: Wed Aug 18, 2010 2:49 am
by mradfo21
that kind of feature is something I imagine Octane isn't designed to do. However, its an easy feat. All your looking for is a Surface Shader (in maya). I imagine your using it to generate a matte of some kind for compositing.

Re: Shadeless materials

Posted: Sun Aug 29, 2010 8:46 am
by radiance
Hi guys,

This, although simple concept, does require large changes to the path tracer,
and it would make things slow. (more flexibility = less speed)

I think we need to finish octane v1.0 as an unbiased engine before we start adding tricks like this.

Radiance