Sun, Nov 24, 3:07 PM CST

Evening Light Postworking

DAZ|Studio Fantasy posted on Mar 04, 2016
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Description


Thank you all for the lovely comments on Evening Light - they were really appreciated! Madbat had asked what the Emission settings were that I used on the background plane to provide the light coming in through the 'door' (actually a part of the set that I had switched off the visibility to create an opening) and when I went to look them up, I realised the final effect was as much due to Photoshop postwork as the scene settings... So here are the settings I used to turn a primitive plane into an emissive light in Daz Studio for rendering with Iray. It's not meant as an indepth tutorial, just an outline of how I achieved the light! :) 1) I created a primitive plane and changed it's Diffuse colour to the picture I wanted to use as a background - in this case a desert scene - and lined it up in the render view as a 'backdrop'. 2) I selected the plane in the scene tab, and in the surfaces tab, and applied the Iray Uber Base.duf that is under My Daz 3D Library/Shader Presets/Iray folder. 3) I then applied the Emissive.duf that is in the same folder. This turns the plane into an object which emits light. 4) In the Surfaces tab, I clicked on the small box to the left of the colour bar under 'Emissive Color' and selected the same desert scene picture I had used on the plane. This has the rough effect of turning the plane into a poor mans HDRI dome :) Basically, the emitted light will now be strongest in the spots on the picture that are lightest, and less on the dark areas. With a photo of a sunset, it means the light is most strongly emitted from the natural bright spot in the scene. If you look at the reflection in the floor, you can see how this mimics light showing in the sky but still keeping the shadow of the hills to a large extent. Emission temperature: 2900 Two sided light: Off (there was no need for it to throw light out the 'back' of the plane as it couldn't be seen in the render) Emission Profile: None (I honestly have no idea what this does - really should go read up on it!) Luminance: 50000 Luminance Units: cd/m2 Then rendered (ok, this one took a while!) The results of which you can see on the left. In Photoshop, I then adjusted the Levels a little to alter the light/dark balance, and added a very small amount of Diffuse Glow, which had the effect of brightening the sky and adding a small amount of light bloom to the pillars. I then created a new layer, filled it with black and added the Lens Flare, then set the layer to 'Screen' so the black vanished and I could move the Lens Flare round to the position I wanted. This also created a brighter area in the sky and the effect of a bit of haloing around the ladies hand and the pot. Beyond a faint vignette at the edges of the picture and a very small amount of Dodge and Burn on the roof panels around the ceiling light to bring out their texture a bit, that's about all the lighting adjustments I did in postwork. The red rings show where I repainted a couple of small spots on the render as there were some obvious kinks in the hair/fabric and the chiton base just wasn't playing nice. (Hey, it's an old V2 chiton that's been forced to fit) :) I normally like to get things as right as possible in the render but I also do postwork my images quite a bit as there's sometimes stuff I either just don't know how to do properly in 3D or it's just quicker for me to do in Photoshop. Still learning all the way... :) Anyway, hope that helps a bit. A straight 'it was these settings' didn't seem very useful as the sky was probably the bit that had had the most Photoshopping! Cheers and happy rendering all x

Comments (1)


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Madbat

11:22PM | Sun, 06 March 2016

That's actually quite a handy explanation, thanks a lot for taking the time to explain it! Emission profiles are for using specific manufacturer ief(?) light settings. Say you want to simulate a specific kind of bulb. You apply the profile, and it will simulate the right falloff and brightness. At least, that's the way I understand it off the top of my head. I tried fiddling with that to no effect so I never use it either. I just eyeball my lights till they look right.


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