Light with polygons or LUMI-polys tips and trics?

[fabian-pok]

Hi Guys,

I'm trying to light a set with only luminosity polygons. Are there tips and trics for this? How do a setup the light intensity and stuff like intensity falloff?

Greetz,

fabian

[Janusz Biela]

Problem is that:
1/ If You use Lumi Poly - You will get clean and fast GI without noise with nice "soft" shadows. Problem only with contact shadow (so lumi poly need good GI setup, 2 pass render)
2/ If You use Area lights - You will receive noise close area lights, longer render (becouse You have to setup minimum in Kray 1/4 quality for Area Lights), next problem with Area Lights are "sharp shadows" in renders (renders looks not "soft" in shadows).
Area Lights from Lightwave are not prepare for Kray (in future I hope G. will add shader which will change Area Lights from Lightwave special for Kray., as same in V-ray.

I prefer Lumi Poly
Note:
Now is bug in Kray which block Physky light by Hidden Lumi Poly.

Please post basic scene.

[fabian-pok]

Hi Johny,

Scene can be found at:

http://www.p-o-k.be/3D/tosend.rar

I didn't setup much, I was trying somethings. I did a setup with area light, but I didn't find it greaat looking.

Greetz,

Fabian

(I've attached a render made with area light and stuff, but there is ugly color on the walls)

[Janusz Biela]

Mu favorites setup.
please use all features in Kray: LWF, tonemaping, Reinhard, Physky... and no specular...

[geo_n]

Problem is that:
Note:
Now is bug in Kray which block Physky light by Hidden Lumi Poly.

I think that is why recent renders of kray has not so good interior lighting with lumi poly and physical sky compared to old renders with dpont sky which has more contrast even your renders johny .


My old post

Physical sun doesn't bounce gi in interiors?
When using direct light or area light for sun with dpont sunsky, the light has more bounce inside because of photon multiplier maybe.
When using physicalsky it looks very dark and only very sharp light is there but minimal bounce.

So is this bug fixed?

[jure]

Problem is that:
Note:
Now is bug in Kray which block Physky light by Hidden Lumi Poly.

I think that is why recent renders of kray has not so good interior lighting with lumi poly and physical sky compared to old renders with dpont sky which has more contrast even your renders johny .


My old post

Physical sun doesn't bounce gi in interiors?
When using direct light or area light for sun with dpont sunsky, the light has more bounce inside because of photon multiplier maybe.
When using physicalsky it looks very dark and only very sharp light is there but minimal bounce.

So is this bug fixed?

It will be fixed in 2.2

[pok]

Hi Johny,

Thx for the assist! I have some small questions about the secene.

1. I use the fresnel shader instead of the gradient you use, is there a difference?
2. what is Reinhard?
3. everyone uses that eames chair, where can I find a model of it?

Greetzzz,

Fabian

[Janusz Biela]

Hi Johny,

Thx for the assist! I have some small questions about the secene.

1. I use the fresnel shader instead of the gradient you use, is there a difference?
2. what is Reinhard?
3. everyone uses that eames chair, where can I find a model of it?

Greetzzz,

Fabian

1. Fresnel is good but make longer renders (personaly I use gradient)
2. blending between Gamma and exponential (why? becouse gamma tonemap is too strong, easy to overbright, great real colours...exponential is great and old tonemap but make false colours and kill to strong overbright area...so this is balance between both)
3. this is commercial model Evermotion so I can`t share it.