Phase is easy to use... The reason you aren't seeing any difference is because it's not set to anything. When you click the little "dot" for phase, it only brings up the phase slider. You need to click on the upper-left "square" of the phase-slider, and it will pull up the phase functions. If the "Type" is set to nothing, then your slider won't do much at all. Click the "nothing", and change it to one of Bryce's internal algorithms, and then you can tweak from there to your heart's content! Phase is a useful tool, without it we'd be stuck with VERY little reason to play with Bryce materials... Here's a quick layout of the DTE in case you missed it last time...