i can’t seem to find the rgb sliders for the materials. anyone know where they are hidden?
No more RGB sliders. They are redundand. We have now a massive use of the colorpicker (that makes set you RGB values as well or HSV values).
In the shading tab click on the diffuse color. It will bring you up the color picker. Set RGB values there. Same job for specular color. For the mirror color you have to do the same in the mirror transp tab.