Posted: Mon Jan 19, 2009 12:16 pm
I'm not sure if this is a bug or not, but it strikes me as weird so perhaps someone will explain... Using CM 3.0.12 on CS2:
Open a new image of any convenient size. Select the gradient tool and switch to one of the rainbow gradients. Now drag the gradient from left to right on the image, giving a nice rainbow. Now open CM.
Start in LAB mode. Put a shadow point in the middle of the deepest blue area, and a highlight point in the middle of the brightest yellow area. Now put a neutral point anywhere. Grab the neutral point with the mouse and drag it around a bit. The colour curves dance and you get a (rather grotty) kaleidoscope effect. Now switch to RGB and drag the neutral some more: same effect. All OK so far.
Now switch to HSB mode and drag the neutral about. This has no effect, which I think I understand. In fact, in HSB mode, moving the shadow and highlight points doesn't do anything either. I think that's right too (noting the hue clock always says the brightness is 0%) but I can't explain why.
Finally, switch to wgCMYK mode. Again, moving the neutral point around has no effect. Is that right? Moving the shadow point around has no effect, and moving the bright point has a weird effect I can't really describe.
Would anyone care to explain what's going on? wgCMYK mode interests me most...
Open a new image of any convenient size. Select the gradient tool and switch to one of the rainbow gradients. Now drag the gradient from left to right on the image, giving a nice rainbow. Now open CM.
Start in LAB mode. Put a shadow point in the middle of the deepest blue area, and a highlight point in the middle of the brightest yellow area. Now put a neutral point anywhere. Grab the neutral point with the mouse and drag it around a bit. The colour curves dance and you get a (rather grotty) kaleidoscope effect. Now switch to RGB and drag the neutral some more: same effect. All OK so far.
Now switch to HSB mode and drag the neutral about. This has no effect, which I think I understand. In fact, in HSB mode, moving the shadow and highlight points doesn't do anything either. I think that's right too (noting the hue clock always says the brightness is 0%) but I can't explain why.
Finally, switch to wgCMYK mode. Again, moving the neutral point around has no effect. Is that right? Moving the shadow point around has no effect, and moving the bright point has a weird effect I can't really describe.
Would anyone care to explain what's going on? wgCMYK mode interests me most...