[REQ] Invisible Mesh Light Emitters

Zom-B · Post by **Zom-B** » Fri Aug 25, 2006 1:40 am

It would be great if it would be possible to swith visibility of Mesh Light for the rendering on & off,
So there would be more flexibility to light up a Scene with more Light "from nowhere".

okazaky · Post by **okazaky** » Sat Sep 16, 2006 2:52 am

Yes, would be really nice

Moreover it would be cool to get more options for light emitters which could help to adjust brightness and fallof.

mcgrathfx · Post by **mcgrathfx** » Thu Sep 20, 2007 4:22 am

Hi,
Just a noob question - has this (invisible mesh light) or an equivalent been implemented yet? I searched the forums and perused the Manual but couldn't find an answer. I need a sperical or point light that illuminates yet is invisible in the render. Using Blender 2.44 and Indigo 0.8. Thanks

suvakas · Post by **suvakas** » Thu Sep 20, 2007 4:26 am

Nope, it's not implemented.
Can't do it at the moment.

Post by **OnoSendai** » Thu Sep 20, 2007 4:27 am

No, it hasn't been implemented.

mcgrathfx · Post by **mcgrathfx** » Thu Sep 20, 2007 4:29 am

Thanks for the quick reply - OK then, I'll have to get creative!

Kram1032 · Post by **Kram1032** » Thu Sep 20, 2007 6:48 am

simply make a hipoly sphere (I *think*, a primitive wont work... dunno....) and decrease it's size close to zero -> sphereal close-too-point light source^^

mcgrathfx · Post by **mcgrathfx** » Thu Sep 20, 2007 9:04 am

Kram,
You must be reading my mind - this is exactly what I was going to try (getting creative) when I got home tonight! Although a larger sphere would probably give me the soft shadows I need but I'll experiment with it. Thanks again.

CoolColJ · Post by **CoolColJ** » Thu Sep 20, 2007 11:20 am

will null material do the same?

mcgrathfx · Post by **mcgrathfx** » Thu Sep 20, 2007 3:32 pm

CoolColJ,
Hmmm......interesting thought - I'll have to give this a try as well.
Thanks.

Kram1032 · Post by **Kram1032** » Fri Sep 21, 2007 1:03 am

wont work, I bet, as every light gets a dummy mat, 0 0 0 black diffuse.....

zsouthboy · Post by **zsouthboy** » Fri Sep 21, 2007 1:39 am

Uh - null material is just that - null.

it won't appear in the render, and it won't affect the scene in any way.

Kram1032 · Post by **Kram1032** » Fri Sep 21, 2007 6:36 am

yes, but lights in any case simply get a black diffuse material, no matter, what you give them. Even with a null.
the difference is, that the light doesn't simply goes through the lamp (which actually wouldn't be quite realistic), but the ray gets killed, as soon, as it hits the lamp (which also isn't realistic, on one hand, but you wouldn't see the caustics from a light source, anyway, on the other hand, and by immediately killing the ray, you get faster rendering

[REQ] Invisible Mesh Light Emitters

[REQ] Invisible Mesh Light Emitters

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