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Better Stronger Faster: study of ambient occlusion

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Figure is stock Genesis 2 Female with a variety of morphs applied - only slightly improved over last render. Purpose of this render was merely to play with light. On a whim I decided to give point based occlusion a whirl. It can be found in the scripted 3Delight settings in the render settings.

Strangely it (point based occlusion) seems to have had the effect of enhancing UnberEnvironment 2's Bounce mode, which I am very fond of, so I intend to spend more time trying to understand what exactly these things are doing when combined. The scene is lit with a single Uberspot light. Why is that back wall illuminated? I don't know. Either mode used alone (point based occlusion or uber bounce) leave the walls surrounding the scene virtually unlit, but together we get something much more realistic.

Not sure why the edge/corners of the room appear lighter than the rest of the wall. Typically occlusion works to darken areas like that. Oh, and I forgot to mention this one was fast, really fast - just under 20 mins on four threads. That has to be some sort of personal best when digging through my render library.

Tools: DAZ Studio/3Delight/Photoshop Elements
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KRTArt's avatar
This render is great! I like her pose:). I've got Genesis 2 Female also although I didn't get morphs.
Jim-Zombie's avatar
Thanks. I've been spending a good deal of time on poses lately. They have never been a strong point of mine, so I thought I should step it up a bit. The morphs need a bit of tweaking on my part, but I'm a big fan of Genesis 2. I'm sure one day I'll start modelling my own figures, but I the skill to create figures and morphs of this quality will take a long time to develop.
spearcarrier's avatar
There are threads in 3Delight? *scratches head and looks again*
Jim-Zombie's avatar
I set the threads from the windows task manager. DS really should have a control to do this though. Most 3D software does.
spearcarrier's avatar
Yeah you just went into "i have no idea what you're talking about" land. LOL!! I only just got the hang of threads in Lux... which I haven't had a chance to play with again in a long while. I need to make some time.
Jim-Zombie's avatar
Multithreading is basically the ability of CPUs (not all can) to concurrently process multiple errr... processes. On my i7 I have 4 cores, each of which can process two simultaneous threads. Due to heating issues during long renders I have to shut down one of the two threads on each core to keep heating at reasonable levels.

I don't know too much about the technicalities, so I hope that's fairly accurate.
spearcarrier's avatar
Yeah I kind of understood that but wasn't sure. I think this mean I can 8 threads because I have a quad? I've never run it past 6. Too nervous. LOL. Even so at 4 there was a point with the Egyptian render that things just stopped developing and you could tell that although it didn't look quite finished it wasn't going to get any better. I never figured out what was wrong.
Jim-Zombie's avatar
The more cores you use the quicker everything will render. Puts more strain on your CPU, so more heat, but if you've got good cooling it'll mean you get things done a lot quicker - great for overnight renders or when you're out.
spearcarrier's avatar
I never thought of the cooling issue. I guess I'll have to make that a top priority after replacing the last video card I work out. ;-) I look inside this case and I'm not sure where there *is* to put any cooling.
Jim-Zombie's avatar
Grab core temp and see what your computer does when rendering. Most PC users jump up and down if their CPU reaches 80 C or the 70c odd that manufacturers suggest as max for case temperature. In most cases the CPU can handle a good deal more. Here's the program www.alcpu.com/CoreTemp/ I should point out that different CPUs have different recommended max temps too. For me, if I can keep my cpu at or below 90c for overnight renders I'll be happy - might shorten the life of the chip, but that's just part of doing heavy work like rendering.
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