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Re: Why so blue?
Ok, so after poking around and doing some reading and thinking on the problem, I'm starting to think my initial guess was right - that this is an issue of gamma correction. This means two things: #1 - You artist types arent just smoking crack or anything :P In fact actually whoever originally picked up on the whole "use a… -
Why so blue?
Alright, so most people have seen or created specular maps that have prominent blue colors in them, for various effects, but it seems many do no actually understand why we do this. I've had a few discussions with programmers about this from time to time, because they never seem to understand why we would want anything but… -
Re: Why so blue?
Hey dudes, great info in this thread, thanks for sharing! Wanted to chip in on self-shadowing normal maps, or at least valve's implementation (coined SSBump). I've been using SSBumps quite a bit in my mod so I have some experience with them. Mattbush is correct in his statement that these are only used with Valve's… -
Re: Why so blue?
I understand what you're saying - and it might seem right because the directional light is usually so much stronger than the ambient light, it looks like it 'blasts it away' - but I don't think its correct. In my version of your example, there is AO all over the character, but only used once, it's not used in the sunlight… -
Re: Why so blue?
This is not correct, though it sort of is in spirit. The actual relationship is more complicated, as it depends on the incident angle of the light source. You can have for example angles where the viewer sees no specular, but the surface is reflecting a lot of light specularly, the result being dark diffuse but no visible… -
Re: Why so blue?
doc_rob: I'm not sure I agree with you there, maybe there's a misunderstanding? What I was saying was that while the character is getting skylighting everywhere (due to the ambient term), there are also areas where the character gets ambient and direct light (direct in this case from the sun). It is these areas where the… -
Re: Why so blue?
That's not what Matt and Whargoul are saying, as I understand it. In your example, the character is getting skylight everywhere (not just where the sun isn't shining), so it should get the AO everywhere as part of that light source. The skylight is "ambient." Since the AO is affecting the entire character all the time, you… -
Re: Why so blue?
Maaaannn... I just ate one of the tastiest knowledge sandwiches I've ever eaten, such a great discussion. I do have a couple of dumb questions to ask though :( For Mops breakdown (the picture he had posted), is the incorrect example just taking the baked out occlusion map and multiplying it over the base diffuse in… -
Re: Why so blue?
My biggest concern is that for certain materials, flesh for instance, you dont want to have grayscale AO multiplied on, you want a more saturated pink sort of color. But maybe this too would be improved with proper gamma correction? And as far as personal preference, i think it helps to make what are generally flat… -
Re: Why so blue?
EQ has asked me to lay some programmer shit on you guys regarding texture storage in real time renderers, so here goes. Some common textures formats: * DXT1: 4 bits per pixel, typically RGB only * DXT5: 8 bits per pixel (4 for color and 4 for alpha) * L8: 8 bits per pixel, uncompressed grayscale * R8G8B8: in theory 24 bits…
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