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Re: no games use coloured specular
In the case of those cars, if you really want to go high-end shaders for the carpaint, there is no way you're going to be using colored specmaps. It's WAY easier to just use greyscale masks and use RGB parameters to change specular and diffuse colors. Otherwise you end up with an RGB diffuse and an RGB spec for every… -
Re: no games use coloured specular
glib: yeah, gunmetal/plastic/rubber aren't so much of the issue really - they will probably look fairly decent even with greyscale spec since they don't have much colour intensity in the highlight (although I have to say that the people who simply "invert the colour of their diffuse" are also missing the point a bit). The… -
Re: no games use coloured specular
If that's the kind of thing you're looking for, one possible solution is to tint the specular via the diffuse. It can be an expensive operation (involves filtering out the bright/dark information from diffuse) but much easier to fit in the framebuffer limitations. If you wanted the red metal to have an orange spec and blue… -
Re: no games use coloured specular
Specularity is an approximation for a perfectly glossy reflection. Light shining on an object is absorbed (diffuse) or bounced (specularity OR reflection). Now really this is more of a diffuse reflection versus direct reflection, but it serves for the current discussion. A surface with specularity AND reflection doesn't… -
Re: no games use coloured specular
yep, at first we had a whole dxt5 for diffuse and specular, the alpha is not compressed, so the specular took quite some memory, later on we moved to a dxt1+dxt1 combo as bram said. the dxt1+dxt1 was about the same memoryusage as a single dxt5 if I remember correctly, only we had access to the three channel diffuse, and… -
Re: no games use coloured specular
Hehe Glib that's exactly the answer I was waiting to hear :P Yep those are rare cases shown here (christmas ball, redbull can) and obviously they are not the type of asset mostly seen in todays games. But! Mop was just showing the most obvious examples to bring the point across. In fact, full color spec has a huge impact… -
Re: no games use coloured specular
Pretty sure you're wrong there. Textures are stored in memory at the size they're passed in at. There should be absolutely no link between diffuse/specular/normal texture sizes even if they're all drastically different and used in the same shader. Not sure what you mean by "has something changed", either, AFAIK it's always… -
Re: no games use coloured specular
Gonna toss my hat in here and give my reason for colored specular. Yes skin has a white specular, but in some situations blue just works better. The thing about that nvidia paper on skin glib is their method for representing skin is hella expensive. To actually use something like that you'd have to approximate a lot of… -
Re: no games use coloured specular
I see a white specular color applied in linear-space in every once of those examples perna. http://http.developer.nvidia.com/GPUGems3/gpugems3_ch24.html "The image on the right made neither of these corrections and exhibits several problems. The skin tone from the color photographs is changed because the lighting was… -
Re: no games use coloured specular
If you're using a deferred shading render system, that right there is the main source of the issue. Most likely what your programmer friend was referring to is lack of deferred shading games in particular having support for full color spec, not games in general. I'm not aware of any deferred shading games that support…
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