Sorry to bump this again, but this remains a very strange problem. I Get the color picker everywhere (Wirecolor, Layer colors...) But when I double click on a color selector in the Material Slate Editor it does not work. I do not get a color selector. (But sometimes in another instance of 3dsmax it does work)
The color picker from the material editor was working, then suddenly it does not open/is not visible anymore when I double-click a color value. I was using Corona Color picker, but resetting to the default does not help. I know most of the 3Ds Max windows can be reset with maxscript (3dsmax.ini file). But how do you reset…