Hi Mark & Karl & David & List : Well , a meeting of 'The Minds' is such a refreshing thing to experience . I am scrambling to even add something use- full ... but must bow instead ...
However , if I may be so bold as to re-cap ... RGB is the way to go to establish a scene's basic tones but with HSV (or even better HSL) ... dialing in photorealism may perhaps be more easily accomplished using whichever colorspace one might be most comfortable with ? Garry Curtis http://www.niagara.com/~studio > Hi > > > Don't forget there's always the Expand option (right click) to get a > > color picker where you can adjust saturation and color in the circle and > > brightness with a slider. But that's no HSV. > > It sortof works for me as a color _assigner_, but it doesn't allow me to > easily do color _modifications_ in HSV space. Heck, two simple RGB2HSV and > HSV2RGB VSL math _operators_ with one input (same output, or as duo with > input/output) would have been nice too. This should be fairly easy to > implement as well for development team as the formulas are already out > there. > > Maybe something for plugin developers? > > > It's also a matter of lack of human color sensitivity why graphics are > > often oversaturated. Grass is green [0 255 0], the sky is blue [0 0 255] > > and roses are red [255 0 0]. Not so! People just don't pay attention to > > all the nuances... > > Color is not absolute by a longshot. It's a perception thing more than > anything else. One color look different depending on what color it is > viewed next to. Timo showed a brilliant example of this on IRC a while > back. Anyone still got that link? > > "Working with color" by Lynda.com is an amazing tutorial I reccomend. > Value is by far the most prominent channel that tells color, not hue or > saturation. Just isolate any picture in Photoshop as HSV channels and see > which is the most varied. > > > At the moment I'm still occupied with landscapes (and lately volumetric > > skies again), I'll see if I can apply HSV for that. > > Indeed I sometimes notice yellowish over-saturation in brightly lit > > areas, maybe RGB is causing this? > > Oversaturation is usually an artist interpretion error. Make any object as > you think it is. Take a photo of the same object and compare them in > Photoshop. You'll probably be amazed how strong your own colors are > compared to the photo. Any brightness overboost will naturally cause > oversaturation even more. > > I think RGB is sufficient for a graphics program to "work with", but > modifying in other colorspaces has its uses, especially HSV. > > Regards > Karl > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.362 / Virus Database: 267.13.0/167 - Release Date: 11/11/05 > >
