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Comments
1. The limits are there so to protect against overexposure. Either use Global Illumination Exposure on the surface or use a strong diffuse only light.
2. For eyelights, use emitters (not specular reflectors). You can set it to specular only light if you want more control. You'll also want to keep the emitter size rather small and/or place it a distance. Dialing in metalness is not the way to go. Depending on the figure you'll using, you can either use the cornea and/or eye surface/reflection zones.
Hmm I'll try GI exposure...
Well I tried to explain that I do get highlights without adding specular lights. Eyes do reflect things, not only lightsources. To get a reflection metalness is apparently the only way. Same goes for every transparent surface like windows, glasses and bottles. Opaque surfaces do reflect properly.
Well dialing up specular exposure does help a bit.
From your comment I understand that it is not possible to use the workflow the guy at art station used. The thing with that render was just the umbrella reflecting in the eyes, wasn't it?
Here are a couple of renders where I used the umbrella I made (a flattened semisphere with a white diffusecolor) and a small arealight with very high intensity pointed at it. A keylight small arealight pointed down in front of him, a left side fill and a high intensity backlight, no environment sphere. Environment light with default camerabased exposure and 6500K, saturation, dodge and burn zeroed. There is a floor and two bounce planes invisible to the camera, no reflection/refraction, ambient occlusion/indirect light enabled.
1. Untouched render
Postworked
2. Dropped the keylight and sidefill 0.5EV, to get more depth, also changed the backlight angle slightly.
Untouched render
Postworked
3. Same as 2, only changed to Aces tonemapping.
Untouched render
Postworked
So I have removed the environment sphere from the equation but still have exactly the same issues with contrast. Any further tips for getting a bit closer? Not sure but I don't think I can increase for example the backlight anymore, it's maxed out. I can drop the other lights, personally I like the postworked nr2 most. I really don't like the red tint I get out of the box. Maybe just play with temperature, as 6500K does not seem to give me a "neutral" overall temp. Or play with SS color? Skin saturation etc? I feel it's not the skinsettings, I get the same with environments.
Or maybe just accept that this is how it works?
That did the trick, tks!
Conversion test render 28 min.
I also actually forgot this : You can also use the gamma slider in the Use Color Correct. The max value will always be limited to 1, but you can push the lower values higher.
Noted
! It's not hard though to get the reflector evenly lit. I'm now trying to create a very bright spot in the center for eye reflections so need to use a reflective material and adjust spec. roughness and strength for the desired effect. Tks for triggering this idea, having loads of fun:)
@wowie
Could it be that part of the contrast "issues" I'm having is due to the compression of the diffuse light intensity range being a tad too harsh? That would result in reduced contrast and too bright specular highlight especially in scenarios with a very high overall light intensity?
Playing around a bit more with my umbrella set. Ditched the metalness on the cornea but lost the highlights even with specular exposure at 3. Ajusted the skin SS a bit. Scaled down the umbrella and increased global illumination exposure. Lowered the key- and left side fill exposure by 1 EV. The result was obviously lost detail on the face so not a good idea in this case. Added a curtain to catch some more bounce rays. Increased GI illumination on the floor and the two hidden bounce planes by 0.5.
With post adjustments
Lowered the umbrella intensity and increased keylight back to where it was. Ajusted umbrella light from a slightly warm to neutral white. Raised upper luminance by 0.3 and lower by 0.2. Increased camera based exposure from default ISO 800 to 1200. Getting closer...
Raw render
Minor gamma adjustment in post
Environment light settings
Tweaked this set some more...manged to double the rendertimes:)
Took a bit of fiddling and 12x12 pixelsamples to get that DoF effect but I like it. Rendertime 7min, no post...
I think this is quite ready:
Without and with abberation.
Hm I guess you mean chromatic abberation and not "deviation from truth and morality"?
This will be added to transmission?
...next up...WIP...first testrender, a few things to sort out
So I lowered the rimlight a little and increased the sidelight, about 0.5 EV, thought the highlights were a bit too blown out. Think I need to go back, like the first one better. Hmm...
So I rolled back the lightsettings, slightly longer F/Stop, and realized the hair needs SS so used aweSurface instead of AWE Hair. Will settle with this for the final render. Rendered with 2048 Irradiance samples, diffuse depth 3 and reflection depth 2, 12x12 pixelsamples, minimal gamma adjustment in post...
Scifi Rescue Module interior
Had to ditch the normalmaps, still some issues at grazing angles.
Sven, when you're adding that eyelight umbrella, do you aim it to cover the centre of the pupil on purpose or does it just happen? Those characters look as if they had cataract as a result...
Hi, good to see you around:) Well the primary purpose is of course adding diffuse light, but yes I actually wanted that effect but haven't been able to quite nail it yet. Been thinking of using a mask to make it starshaped or whatever...
Pretty good.
As for normal mapping, I think i've figured it out. I'd probably going to have it more like bump mapping support now so you can have a combined or separate normal for each layer.
A test shot.
With and without.
Combined with bump and displacement (using specular maps).
Tks wowie! Wow that sounds really nice;)
The cataract effect?
Look, I might be overreacting because I used to deal on a daily basis with a person blind in one eye due to a cataract, but, well... let's just say that I have never seen a photographer aim an eyelight in the centre of the pupil. It's usually at an angle, so that the pupil is still visible. I have even heard/read that having a black pupil in the image is a must because otherwise people are going to perceive the character as dim-witted. Can't find any sources right now, but I'm not making things up, it was from some pro advice aimed either at artists or photographers.
PS The forums seem even more of a mess than they used to be.
Yeah, it was a really confusing problem to solve. Seems like most people like to overdrive the maps, so I think I'm going to support that also.
Tks for the advice, much appreciated. You are right of course, you always are:)) But, you know, me not being very artistic, I dabble around and test a million things and eventually I get it close to what I see it in my head. Scaling up the reflector so its reflection is larger and not the relative size of the pupil might help:) But yeah on that girl portrait I should have moved it around a bit...
...not to mention the store...it's pathetic really...
Sweet!!
The next kit update will change most of the .dsa files with .duf versions. Nearly finished with the conversions, only the character stuff remains.
This should help shave off waiting times when you first apply AWE Surface to props/figures/clothing. The difference should be very noticeable. So, save your material/shader presets in .duf.
Off topic,
@Sven, is it me or does the new DS builds feels sluggish/slow compared to older ones? I have both 4.7 and 4.14 Beta installed and 4.7 is both faster with animated poses/loops and re-loading scenes.
Well I'm still on 4.9. Have the 4.10 beta which I use only if I need to dForce something. I really see no point in updating unless DAZ suddenly upgrades 3DL to use OSL and USD etc. which will not happen. Filament would be nice but PC only, so...will probably get the newest beta if they port it over to the Mac. From the comments on the forums I've seen a lot of complaining about slow rendertimes crashes and whatnot. Not surprising considering they can't seem to manage to run even their own store properly.
You're welcome :) (I could only wish I were always right, though)
I think I read something about an interesting eyelight trick for frontal shots - it's to have bright petal-like lightsources around the camera, and the character should be looking straight at the camera. Then their pupil remains dark but there's that starburst reflection over the iris. I hate frontal shots, so I never tried anything like that, but it's similar to gemstone photography trick of having a bright reflector around the lens.
Ring camera light? Should be doable by playing with the poly shape inner radius. I also think there was a dev build where I was able to make a spoke/star like shape.