Weird lighting issues

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Poser (Integrated Plugin developed by Paul Kinnane)

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Weird lighting issues

Postby Tigersan » Wed Nov 02, 2016 6:20 am

Tigersan Wed Nov 02, 2016 6:20 am
Im using path tracing, and Octane 2.4 poser plugin.
Using 2x Titan X

Ill divide my description into 3 pieces.

1.) I made a scene similar to Tron Grid from the movie, with a character in it and
two lights - black body emitters. on the first pic everything is working just fine
rendering is fast
Image

2.) Made the ground emit grid pattern light the rendering became a lot slower
the light from the black bodies takes a lot longer to show up and the pixels
show up one by one on the character's skin. The higher i set the power of emission
on the ground grid the longer it takes for the black body character lights to show up...
Image

3.)After i made the sky texture emitter, the process becomes even slower
the more light there is from sources other than the black bodies the slower
the process gets... when i set the sky to a higher emission level, weirdly high
i might add like 10000 then it starts emitting and the result of the sky light emission
renders fast only the character lights i set up don't work... im guessing they
will show up but it takes FOREVER... When i aim the camera at the lights the
glare is there so the lights are working but it takes forever for the illumination
to show up on the character's surface...
Image

Bright pixels on the 3rd pic are appearing to be the pixels of the correctly lit
up character slowly showing up... All 3 pics took about 10 seconds to render.

4.) This pic rendered for over 30 minutes and it looks like absolute crap.
At 3170 S/P... I have no idea whats up... All I want is to be able to use
different kinds of lighting together, and it seems its not working like it should.
First image rendered for 10 seconds, the skin looks like it should look like...
Image

What am I missing?
Software: Poser 11 Pro, Octane Studio 2020.1.5.104, Adobe Suite

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16GB RAM
Nvidia GTX 870m 3GB VRAM
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Re: Weird lighting issues

Postby face_off » Wed Nov 02, 2016 7:16 am

face_off Wed Nov 02, 2016 7:16 am
I think the Scatter node on the figure's skin is trying to scatter the light from the bodysuit emitter, which is causing the noise. I suggest using a non-SSS skin shader in this instance.

Paul
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Re: Weird lighting issues

Postby Tigersan » Wed Nov 02, 2016 7:30 am

Tigersan Wed Nov 02, 2016 7:30 am
face_off wrote:I think the Scatter node on the figure's skin is trying to scatter the light from the bodysuit emitter, which is causing the noise. I suggest using a non-SSS skin shader in this instance.

Paul


Well, It took me weeks to make this skin material, and im not going to change it now, just because
Octane has issues with the lights... Is there anything else i can do without changing the "heart" of
my render? Skin materials are untouched on all 4 pics they are exactly the same... Only difference
is floor light emitter setting and the sky emmitter setting, those are only changes that cause this...
Besides the most noticeable difference is the specular channel looks like its disappeared.
Last edited by Tigersan on Wed Nov 02, 2016 11:45 pm, edited 1 time in total.
Software: Poser 11 Pro, Octane Studio 2020.1.5.104, Adobe Suite

Home Rig:
Windows 10 Pro 64
Ryzen 5900x
128GB RAM
2x Nvidia 3090
2x WD Gold 7.68TB U2 NVME

Laptop:
Windows 10 Pro 64
Intel i7 4710HQ
16GB RAM
Nvidia GTX 870m 3GB VRAM
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Tigersan
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Posts: 115
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Re: Weird lighting issues

Postby face_off » Wed Nov 02, 2016 8:18 am

face_off Wed Nov 02, 2016 8:18 am
What is your GI clamp set to? And if doing a dark render, set your Path Termination Power accordingly (see the link in my signature). To see the actual light causing the issue, turn on all the render passes and check which pass is producing the problem. My guess is it is the SSS pass.

Paul
Win7/Win10/Mavericks/Mint 17 - GTX550Ti/GT640M
Octane Plugin Support : Poser, ArchiCAD, Revit, Inventor, AutoCAD, Rhino, Modo, Nuke
Pls read before submitting a support question
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Re: Weird lighting issues

Postby oguzbir » Wed Nov 02, 2016 10:47 am

oguzbir Wed Nov 02, 2016 10:47 am
increasing samples for emmisive materials might solve your problem here..

Geometry area for emmisive property is too small.. . Increase samples...
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Re: Weird lighting issues

Postby Tigersan » Thu Nov 03, 2016 12:03 am

Tigersan Thu Nov 03, 2016 12:03 am
oguzbir wrote:increasing samples for emmisive materials might solve your problem here..

Geometry area for emmisive property is too small.. . Increase samples...



Increasing samples did the trick! Thanks!

This is after 4 minutes of rendering: it looks like it should!
Image

Thank you oguzbir and face_off for the help! :)
Software: Poser 11 Pro, Octane Studio 2020.1.5.104, Adobe Suite

Home Rig:
Windows 10 Pro 64
Ryzen 5900x
128GB RAM
2x Nvidia 3090
2x WD Gold 7.68TB U2 NVME

Laptop:
Windows 10 Pro 64
Intel i7 4710HQ
16GB RAM
Nvidia GTX 870m 3GB VRAM
User avatar
Tigersan
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Posts: 115
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