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Re: UDK - Material - Oren Nayar Help
Nice that there are DVD's now. :) Less slogging through Nvidia tech docs and MSDN and taking apart other peoples code to find what actually works. Also the packages here don't seem to show anything in my version of UDK, what release are you gents up to? Further: I built up a functional oren-nayar model. And I learned to be… -
Re: UDK - Material - Oren Nayar Help
Yeah I really never did coding either (never liked code much); I'd say the training's good for beginners. It goes from the very beginning and doesn't assume you know too much about coding, and although it goes over the basics very quickly, all of the files are provided with lots of comments. If you are familiar with… -
Re: UDK - Material - Oren Nayar Help
Tutorials are for chumps. :-P Seriously though, you may be better off with language reference than a tutorial. Search for HLSL on MSDN and you'll have a full function listing and syntax help etc. Cg is a subset of hlsl. Meaning everything you can do with Cg can be done in hlsl and more. The syntax is Identical. edit: ok… -
Re: UDK - Material - Oren Nayar Help
Wow, speedy. Guess I'll dive in when I get the time. I have never done any coding, I mean I did really basic C++, I love fiddling with the UDK node editor, would you say its good for beginners? -
Re: UDK - Material - Oren Nayar Help
I'm guessing I'm just being stupid since most of the tutorials I watched are core HSLS video. HSLS in 3DS Max by Ben Cloward (CG Academy) and ShaderCGFX for Maya (eat3D) go through such basics and almost always end up NOT translating well for UDK. I was going to make a Strauss lighting model alongside Oren Nayar, but the… -
Re: UDK - Material - Oren Nayar Help
Cool, I guess I'll get started tomorrow. I found this free app called Paragraf for my iPhone earlier this week, it lets you write GLSL code and preview it instantly with hardware acceleration using the iPhone's camera as input for textures. Had some fun reverse engineering the provided examples. -
Re: UDK - Material - Oren Nayar Help
@Malk: Here you go: It's an Oren Nayar issue me thinks, not your implantation, since from what I remember, the lite version of the code that is around the web cuts out the the direct falloff rate and only keeps the light/eye direct math, hence why any kind of SSS solution that could use Oren Nayar as it's lighting term… -
Re: UDK - Material - Oren Nayar Help
-Nope. it's squared in the equation because it's the root mean square, but it's a unit in itself so there isn't any need to calcul(blabla it's just a superfluous multiplication). -Roughness goes from 0 to infinity. But anything over 1 might not make sense. -AVOID INVERSE TRIG. yes, that is how you do it (with all hlsl… -
Re: UDK - Material - Oren Nayar Help
There's no equivalent max and min nodes that I know of, so you'll need to use an if node. Basically for Max: if A > B use A, and vice versa. -
Re: UDK - Material - Oren Nayar Help
Thanks for the help :) @Computron I got and finished the dvd, and I thought it helped a lot so thanks! @Vailias That quick step-by-step helped a lot actually (clarified things about input); I set up a custom node and got things working, but for this case it turns out I can do things without a custom. I finally go…
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