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Hmm, I'm rendering in two DS instances atm. so can't check:) Can think of a number of reasons... When you select the awe environment (the root node) and go to lights there is an exposure slider which should default to 1 IIRC. Try resetting all parameters to default values to begin with, then select the sphere and go to the surface pane, scroll down and you'll find another exposure slider(defaults to 0 I think) + gamma(1 means no adjustment to the default 2.2, set in the render settings) gain, saturation and whatnot;) Maybe some of those settings are off? And earlier you mentioned you raised the diffuse strength for your skin to brighten it up, maybe try to lower it to 50% or thereabout, see if that makes a difference! The env. sphere looks washed out too so I think it's something with your light settings.
So I went ahead and installed the Genesis 2 Starter Essentials so I could start a new scene with the start up scene for AWE. Got it all installed and I got a black render. When I turned down the Opacity strength down I got a render I could see but isn't the whole idea of having an HDR map inputted into the Diffuse channel for this to give the scene a natural light source?
Never mind. I'm stupid again. The engine was set to iRAY rather than 3Delight. DUH! LOL
LOL Yea, don't go there! lmao
So found that by copying the skin settings from G2F over to G8M mostly got the skin working well enough but need to tweak that some more as he's supposed to be tan (Italian character) but the eyes are a mess still.... not sure how much time I'm going to have to spend investigating how to get them looking more natural and without that weird ring around the Iris.
Sorry can't help you with G8 as I don't use them, still on G1 lol. But you could try adjusting IOR on the eye surface or cornea. When I was still using the vanilla shaders/renderer I got nice results by setting IOR to1.59, worth a try?
ETA: I recall seeing some discussion, maybe in the commons, about G8M eye problems, couldn't find it now tho:(
I'm sorry to be so ignorant but what is IOR as I can't find that setting under the surfaces tab....
OK, found the culprit. It's the Global Illumination when on it creates the ring. There are sliders just under it so I'm going to move those around to find what may decrease this affect.
Index of refraction, it's set to 1.50 by default I think, it's almost at the top, after the base color stuff.
Didn't make any difference. So not sure what to do to try to resolve that! Need Wowie to look into that......
There are three options but none are at the top. There are:
Subsurface Refraction
Coat Index Of Refraction
Reflection & Refraction button which is set to ON!
OK, nothing is working. Eyes are important and if they can't look natural then it's a no go for me. Hopefully Wowie will have the time to look into this. I can't waste a whole day like that. Thanks so much for the help!
Not the thinfilm IOR, the next one;)
Hmmm, well for what ever reason those are not in the base shaders for the figure. I see that's showing for the plane you have there but not for the human figure, at least not Genesis 8. Not even in the hidden values!
@RAMMWolff
Would it work to simply hide the eye surface by scrolling all the way down in the surface tab and toggle camera off? Then use sclera and/or iris with IoR and reflections?
Ok now I'm confused;) Stupid question but are you sure you applied the awe shader to the eye surface?
Also could try changing the specular BRDF (type) for the eye surface to CookTorranceClassic;)
OK, found them but makes no difference the rings are still there.
I guess if someone or Wowie can't, won't or doesn't know how to resolve this I guess my idea of including the character with an AWE shader set up is shelved...
Sorry I couldn't help, I'm sure someone knows how to deal with this!
You've been more than helpful but this seems internal within the shader itself. I even loaded up a fresh copy of Genesis 8 male, applied Wowie's shader for that particular generation and then set the IOR to your suggested 1.59 but still have the ring around the Iris as well as a light area around the outer sclera. It's very strange but very off putting!
With G8, I get a shiny ring on the sclera. Here's a sclera preset from my WIP featuring Gia 8; I tried to minimise that effect, but I didn't test in that many different lighting situations. Try using it as a base.
Somehow I can't upload things in the forum today, so I'll use my mediafire acc.
Here's what the render looks like - http://www.mediafire.com/file/ucnrvm4u2q7hn60/awegia_nateyes_bluerlight.png
Here is the preset - http://www.mediafire.com/file/laq3lohnn28q61e/Gia_Sclera.duf/file
PS Hmmm okay the files uploaded to the forum, as it turns out, though I couldn't see them when posting. So the links and the post attachments are the same.
I just hope you know what those sliders are doing, right? =)
Forgot to add that I always disable this "EyeMoisture" surface on G8; it's geometrically redundant. Just use UberSurface on it, turn everything but Opacity off (including visibility options), and set opacity to 0.
THANKS SO MUCH. I'll give this a try!
The spheres included with the quickstart scene can be used to gauge what intensity you should use for light sources, including the strength of the environment sphere. You could go at lighting in two ways.
In addition to intensity/expsoure, you can also adjust the distance of the emitters for point/spot/area lights. Specific to area lights, emitter size also plays a part. Basically, at the same intensity/expsoure, larger emitters emit more total light and vice versa.
Try to keep the white diffuse ball below pure white. I usually render out the ball, then view the color values in image editor with a color picker. The ball should be something close to 255,255,255 but not all across. These setups should give youa light setup that's consistent for all materials (metal, glass, diffuse).
Specific to skin, this will likely vary depending on the texture used. There's a lot of suggestions but here's mine.
Start with the generic skin material at really low diffuse strength. Use either the SSS profile of skin1 or skin2 preset, since they're based off actual measurements found here - https://graphics.stanford.edu/papers/bssrdf/bssrdf.pdf. Skin 2 tends to produce a brighter look and is the default for AWE Surface. There are times where skin1 is better, mostly on very pale skin with too much SSS baked in.
I used 40% since that's what Pixar got when converting scatter/absorption values to albedo/mean free path
https://renderman.pixar.com/resources/RenderMan_20/subsurface.html
Table of scattering values
albedo dmfp [mm] ior apple 0.846 0.841 0.528 6.96 6.40 1.90 1.3 chicken1 0.314 0.156 0.126 11.61 3.88 1.75 1.3 chicken2 0.321 0.160 0.108 9.44 3.35 1.79 1.3 cream 0.976 0.900 0.725 15.03 4.66 2.54 1.3 ketchup 0.164 0.006 0.002 4.76 0.58 0.39 1.3 marble 0.830 0.791 0.753 8.51 5.57 3.95 1.5 potato 0.764 0.613 0.213 14.27 7.23 2.04 1.3 skimmilk 0.815 0.813 0.682 18.42 10.44 3.50 1.3 skin1 0.436 0.227 0.131 3.67 1.37 0.68 1.3 skin2 0.623 0.433 0.343 4.82 1.69 1.09 1.3 spectralon 1.000 1.000 1.000 inf inf inf 1.3 wholemilk 0.908 0.881 0.759 10.90 6.58 2.51 1.3In theory, pure diffuse = 100% diffuse so diffuse & SSS = 100% SSS + ((100% diffuse - 100% SSS) * 100% diffuse). What does that mean? Translated, you want strong enough SSS to get translucency in ears/nose/fingers with powerful light, but keep SSS from overpowering diffuse. Although it looks confusing, it's actually very simple. Adjust the diffuse input until you've found the final look. I'm using 100% SSS as an example. Obviously, you can choose a lower value.
Here's where it gets messy. It will really depend on the brightness of your textures. I found really dark textures (for dark skinned characters) sometimes needs up to twice the strength of light skin ones. Way too dark ones can sometimes be just almost impossible to use. Vice versa, way to light (pale close to pure white, tends to look really washed out).
There are lots of knobs to adjust final SSS contribution. The first is obviously subsurface strength. Subsurface phase (direction in iray) also plays a huge part. The literature is clear that human skin should be around 0.8. I haven't a clue on what iray uses for direction, but here's Larry Gritz explanation
If you need more SSS and already have SSS strength at 100%, you can try using a higher phase value. Be careful though since it's exponential. For example, 0.9 will be way more than two times stronger than 0.8.
You can also mix more of the diffuse texture by playing with 'Use Diffuse Texture with SSS'. This multiply SSS with whatever you use for diffuse texture, leading to a generally darker, more saturated output. This is separate to using a texture in the subsurface color/strength slot.
Finally, if you want less SSS showing through (outside of the usual tweaking of scatter/absorption values), you can increase diffuse strength and dial down Global Illumination Exposure. I found small negative values ie -0.25, a nice compensation to adjust for very bright diffuse textures in addition to use low diffuse strength.
Edit: Clarify skin1 or skin2 is SSS profile presets.
Tks wowie, excellent tip!
Found what's causing the problem on the sclera.
Left to right. Default preset with the Genesis 8 MAT. Eye moisture with Glass 3 preset, Eye moisture and cornea with Glass 3 preset.
Actually, it's not the sclera that's the problem, but the eye moisture part (as Mustakettu pointed out). I wrongly assume the newer figures kept the mesh structure of previous figures. Rather than using the default cornea/tear preset, you should use the legacy 'Glass 3' preset for both. The way both surfaces are built isn't friendly to how AWE Surface render transmission.
It does mean you don't get refraction from the cornea and eye moisture though.
I'll have to see whether or not that's true for the Genesis 3 preset.
Edit:
After looking at the eye model of Genesis 8, the way the eye moisture/cornea is built is, well, odd. The cornea is actually joined to the eyesurface, and the eye surface fully encapsulates the eye. However, instead of a thin layer with actual thickness, the thickness spans from the front of the eye to the back.
Gensis 3's eye model is different, but it seems like it produces the same exact problem in renders, but less noticeable. Since both surface are already fully transparent, you can simply just turn off transmission for both surfaces on Genesis 3 and 8.
WOW.. Thanks for the detailed help. SO thankful. SO it's the moisture that's causing this. Will you be issuing an official update when you've determined if it's affecting the Genesis 3 models as well?
OK, read up on your skin suggestions. AWE, from what I can see doesn't have the two skin options nor any of the others. I have Genesis Male 8 selected using the select skin quick select (always add in the lips, not sure why the lips are left out of that, lips are skin! LOL ) and scrolled very slowly down the list of available shader options and don't see that drop down that I see with using regular 3Delight setups. So not sure or not understanding why you brought that up about using Skin 1 or Skin 2 options.
It's unfortunate that I don't have a mind for technical stuff too much, so trying to get my head around all this is a bit daunting for me.
Hmmm, just tried your suggestion about the eye moisture. Basically I reset all the values to default, removed the bump map and turned off the transmission. The only thing that's active is the opacity but I'm still getting a white ring around the Iris.
OK, read up again. Your suggestion to apply the glass shader worked the trick but I had to go back and turn the opacity back down. YAY One thing solved. Have no idea now, again not a technical guy but glad that works!