Digital Art Zone

 
   
3 of 6
3
Glowing Head Problem, with subsurface scattering (interjection) addon, DS and Genesis Figure
Posted: 08 December 2012 03:50 PM   [ Ignore ]   [ # 31 ]
Addict
Avatar
RankRankRankRank
Total Posts:  2945
Joined  2011-12-10
scorpio64dragon - 08 December 2012 03:34 PM

I’ve never had to go above 4.
Your lights seem very bright to me and raising the bias seems to have helped but it might cause problems elsewhere with shadows.
I often find it is a act of balancing several things.

I actually dialed them down a lot.  The Backlight is typically very bright.  I have the UE2 set at 52.6%.  The Key Light is at 75%, Fill: 25%, and Backlight at 150% (that’s a normal settup with the back light double the intensity of the key light).

I used some of the tricks I learned at Dreamlight to get this settup.  Not all, mind you, but some.

 Signature 

My DeviantArt Galleries
My ShareCG Gallery
OPENSUBDIV Testing and Discussion
3Delight Surface and Lighting Thread

Profile
 
 
Posted: 08 December 2012 03:52 PM   [ Ignore ]   [ # 32 ]
Member
Rank
Total Posts:  112
Joined  2012-02-05
wancow - 08 December 2012 03:43 PM

It’s raytracing that gets rid of the lines.  It seems those lines come from Shadow Mapping.

Here it is, Shadow Bias 0.1 with ray traced shadows, my materials.

HOWEVER: it looks a lot like the Raytraced Shadows set at 1.0, but without those lines… interesting… I’ll play with the scale and see what happens.


The specularity on this one seems a bit high, are you using a spec map? Either way you might want to lower the spec to get fewer highlights this looks a bit too bright.

 Signature 

My images on Deviant Art

Profile
 
 
Posted: 08 December 2012 03:55 PM   [ Ignore ]   [ # 33 ]
Addict
Avatar
RankRankRankRank
Total Posts:  2945
Joined  2011-12-10
Machieltje - 08 December 2012 03:52 PM
wancow - 08 December 2012 03:43 PM

It’s raytracing that gets rid of the lines.  It seems those lines come from Shadow Mapping.

Here it is, Shadow Bias 0.1 with ray traced shadows, my materials.

HOWEVER: it looks a lot like the Raytraced Shadows set at 1.0, but without those lines… interesting… I’ll play with the scale and see what happens.


The specularity on this one seems a bit high, are you using a spec map? Either way you might want to lower the spec to get fewer highlights this looks a bit too bright.

Dialing it down in another render… I’ll probably put these resulting materials up on ShareCG.

 Signature 

My DeviantArt Galleries
My ShareCG Gallery
OPENSUBDIV Testing and Discussion
3Delight Surface and Lighting Thread

Profile
 
 
Posted: 08 December 2012 04:00 PM   [ Ignore ]   [ # 34 ]
Member
Rank
Total Posts:  112
Joined  2012-02-05
wancow - 08 December 2012 03:55 PM
Machieltje - 08 December 2012 03:52 PM
wancow - 08 December 2012 03:43 PM

It’s raytracing that gets rid of the lines.  It seems those lines come from Shadow Mapping.

Here it is, Shadow Bias 0.1 with ray traced shadows, my materials.

HOWEVER: it looks a lot like the Raytraced Shadows set at 1.0, but without those lines… interesting… I’ll play with the scale and see what happens.


The specularity on this one seems a bit high, are you using a spec map? Either way you might want to lower the spec to get fewer highlights this looks a bit too bright.

Dialing it down in another render… I’ll probably put these resulting materials up on ShareCG.

Been wanting to make my own SSS shader but the mixer scares me and I usually end up with all my bricks in a tangle and studio crashing out of sheer confusion raspberry

 Signature 

My images on Deviant Art

Profile
 
 
Posted: 08 December 2012 04:09 PM   [ Ignore ]   [ # 35 ]
Addict
RankRankRankRank
Total Posts:  3236
Joined  2007-06-22

This is a quick render using the Oxygen textures and settings availble over at RDNA, I find them to have the best maps and settings so far.
One distant light and 1 uberenvironment with HDRI map.

Image Attachments
SSSROxy1_copy.jpg
Profile
 
 
Posted: 08 December 2012 04:26 PM   [ Ignore ]   [ # 36 ]
Addict
Avatar
RankRankRankRank
Total Posts:  2945
Joined  2011-12-10

okay, I KNOW where those lines came from: It was the shadow softness.  So: here are my materials, with the specular dialed down to 50%.  The Shadows at 1% soft on Shadow Mapped Shadows… I’ll be replacing the lightset I have posted on ShareCG and I’ll be posting these materials for y’all to play with.

Image Attachments
WC_SSS_wcmats.jpg
 Signature 

My DeviantArt Galleries
My ShareCG Gallery
OPENSUBDIV Testing and Discussion
3Delight Surface and Lighting Thread

Profile
 
 
Posted: 08 December 2012 04:33 PM   [ Ignore ]   [ # 37 ]
Addict
RankRankRankRank
Total Posts:  3236
Joined  2007-06-22

wancow are you saying you need to increase or decrease shadow softness.

Profile
 
 
Posted: 08 December 2012 04:38 PM   [ Ignore ]   [ # 38 ]
Member
Rank
Total Posts:  112
Joined  2012-02-05
scorpio64dragon - 08 December 2012 04:33 PM

wancow are you saying you need to increase or decrease shadow softness.

Decrease apparantly, I knew there was a reason I disliked shadow softness but render I have running atm does seem to confirm that having shadow softness too high give nasty lines with SSS…

 Signature 

My images on Deviant Art

Profile
 
 
Posted: 08 December 2012 04:40 PM   [ Ignore ]   [ # 39 ]
Addict
Avatar
RankRankRankRank
Total Posts:  2945
Joined  2011-12-10

Yes, first I tried it with none at all, then put it to 1% and it seems to be okay.  So decrease it as far as you can while still having it.

 Signature 

My DeviantArt Galleries
My ShareCG Gallery
OPENSUBDIV Testing and Discussion
3Delight Surface and Lighting Thread

Profile
 
 
Posted: 08 December 2012 04:43 PM   [ Ignore ]   [ # 40 ]
Member
Rank
Total Posts:  112
Joined  2012-02-05
wancow - 08 December 2012 04:40 PM

Yes, first I tried it with none at all, then put it to 1% and it seems to be okay.  So decrease it as far as you can while still having it.

Sqeee! an other mystery solved now all I need is a few more computers so I can render more…

 Signature 

My images on Deviant Art

Profile
 
 
Posted: 08 December 2012 04:46 PM   [ Ignore ]   [ # 41 ]
Addict
RankRankRankRank
Total Posts:  3236
Joined  2007-06-22

Sorry no it doesnt always fit I have my shadow softness up high and don’t get the lines if I do I reduce the Subsurface scale.
That render above shadow softness was at about 30%

Profile
 
 
Posted: 08 December 2012 04:50 PM   [ Ignore ]   [ # 42 ]
Addict
Avatar
RankRankRankRank
Total Posts:  2945
Joined  2011-12-10

My Lightset has been updated on ShareCG, but all you really need to do if you already have it, is select all three lights, and jack down the Shadow Softness to 1% or until the shadow lines disappear…

Thanks everyone for all your help doing these experiments.

http://www.ShareCG.com/v/65921/view/21/DAZ-Studio/fast-render-light-set-with-UE2-and-Light-Target

 Signature 

My DeviantArt Galleries
My ShareCG Gallery
OPENSUBDIV Testing and Discussion
3Delight Surface and Lighting Thread

Profile
 
 
Posted: 08 December 2012 04:51 PM   [ Ignore ]   [ # 43 ]
Addict
Avatar
RankRankRankRank
Total Posts:  2945
Joined  2011-12-10
scorpio64dragon - 08 December 2012 04:46 PM

Sorry no it doesnt always fit I have my shadow softness up high and don’t get the lines if I do I reduce the Subsurface scale.
That render above shadow softness was at about 30%

I tried subsurface scaling, and it had no affect at all.  I had shadow softness set at 3% on the key light, 10% on the other two…

 Signature 

My DeviantArt Galleries
My ShareCG Gallery
OPENSUBDIV Testing and Discussion
3Delight Surface and Lighting Thread

Profile
 
 
Posted: 08 December 2012 04:53 PM   [ Ignore ]   [ # 44 ]
Member
Rank
Total Posts:  112
Joined  2012-02-05
scorpio64dragon - 08 December 2012 04:46 PM

Sorry no it doesnt always fit I have my shadow softness up high and don’t get the lines if I do I reduce the Subsurface scale.
That render above shadow softness was at about 30%

When this render finishes (and after I’ve had some sleep) I’ll run some more test on other scenes I have that have the stripes but my current render seems to have improved by dropping the shadowsoftness from 60 to 30% (I know maybe 60% was a bit high raspberry)

besides at the very least weve established that shadowsoftness is a factor with SSS just like shadow bias.


See we’re learning :D

 Signature 

My images on Deviant Art

Profile
 
 
Posted: 08 December 2012 04:55 PM   [ Ignore ]   [ # 45 ]
Member
Rank
Total Posts:  112
Joined  2012-02-05
wancow - 08 December 2012 04:50 PM

My Lightset has been updated on ShareCG, but all you really need to do if you already have it, is select all three lights, and jack down the Shadow Softness to 1% or until the shadow lines disappear…

Thanks everyone for all your help doing these experiments.

http://www.ShareCG.com/v/65921/view/21/DAZ-Studio/fast-render-light-set-with-UE2-and-Light-Target

No problem, it was fun figuring this one out besides I can use what we’ve learned here to improve my renders :D

 Signature 

My images on Deviant Art

Profile
 
 
   
3 of 6
3