Randomizer Fine-Control

Well, the topic says it all, more fine control in the Randomizer would be great.

More specifically, it would be nice to have a Randomize On/Off state for each single control slider on the Settings and Lighting tabs, maybe with a little photoshoppish checkbox to the left of each control as a toggle for this state. This is cool when you are just looking for smaller variation with certain parameter values nailed down.

Also, in the Randomizer Settings under "Parameters to Randomize", I think it would be beneficial to decouple variation, controls and lighting by replacing the radio buttons with a "Randomize ..." checkbox for each. This way you could constrain randomization to any possible parameter combination.