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Lighting Through Plastic
show user profile  killabath
I've created a theater in 3ds max, well recreated this

as you can see on the walls there are little squares of light, I was going to emulate this by extruding the wall inward and placis a plastic material infront of the light which i put into the extruded area on the wall, I used a plastic material that i just quickly saw from alex roman's tutorial here:
(you can see just before halfway down the page he expl;ains how he made his lights, the same way I made mine).

the problem for me is that the lights are making weird patterns, they're turning the plastic completely white and barely lighting anything else, and when I set my physical camera's settings to let in a LOT of light, I can clearly see that instead of lighting the scene the way I thought they would they're making little red and gold blotches of light all across the wall in random places, it would be easier to explain with a picture but i'm not sure how I would get one up. thanks for any help!
read 565 times
12/28/2011 6:01:34 PM (last edit: 12/28/2011 6:01:34 PM)
show user profile  Garp
Did you set your plastic panels to NOT cast shadow?

read 549 times
12/28/2011 6:22:25 PM (last edit: 12/28/2011 6:22:25 PM)
show user profile  killabath
I used all of the same settings here:
for my textures as far as the panel goes
read 543 times
12/28/2011 6:38:48 PM (last edit: 12/28/2011 6:38:48 PM)
show user profile  Garp
Ok. But.. did you set your plastic panels to NOT cast shadow?

read 541 times
12/28/2011 6:43:03 PM (last edit: 12/28/2011 6:43:03 PM)
show user profile  killabath
I guess I don't know what you mean, sorry, this is the first lighting in 3ds max I've ever done
read 535 times
12/28/2011 7:31:01 PM (last edit: 12/28/2011 7:31:01 PM)
show user profile  Bolteon
woot @ roman for putting out that tutorial... a bit more respect for that guy.

-Marko Mandaric

read 534 times
12/28/2011 7:33:53 PM (last edit: 12/28/2011 7:33:53 PM)
show user profile  killabath
He's the reason I started doing 3ds max, the third and the seventh was amazing
read 529 times
12/28/2011 7:36:12 PM (last edit: 12/28/2011 7:36:12 PM)
show user profile  Mr_Stabby
i dont use vray but some things are just obvious - SSS stands for subsurface scatter, im guessing the one there is the simplified type which is basically a lightmap that wraps around the object and simulates volumetric light transfer and scatter. Make no mistake though - the object is still 100% opaque, SSS by itself doesn't transfer any light back into the scene and is only used to get a particular lighting effect on the object itself.

You would probably be better off just using a simple highly translucent material, trivial in MR, no clue how to do it in VRay. Alternatively you could set the shadows off the boxes but that just seems like an unnecessary hack to me.

read 521 times
12/28/2011 8:40:06 PM (last edit: 12/28/2011 8:42:11 PM)
show user profile  killabath
I see so this isn't really to light the scene but only to make it look like there are light panels, thanks!
read 516 times
12/28/2011 8:57:39 PM (last edit: 12/28/2011 8:57:39 PM)
show user profile  killabath
So I've got another problem,
as you can see there, beside each light panel on the wall there is another extruded area, and I have that in my model, but the light keeps bleeding into those extruded areas, I've tried checking the cast shadows box in my light settings as well as checking "check sample visibility" in vray's irradiance options and it seems that nothibng will stop the light from bleeding through.
read 511 times
12/28/2011 9:08:16 PM (last edit: 12/28/2011 9:08:16 PM)
show user profile  Bolteon
just as a heads up, it's kind of hard to tell what your having issues without seeing the issue.

post up images.

-Marko Mandaric

read 498 times
12/28/2011 10:38:51 PM (last edit: 12/28/2011 10:38:51 PM)
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