This is a bit of an unusual one, but it might be good feature for the mid-range market that freestyler is aimed at.
Many RGB fixtures do not provide you with a seperate dimmer channel, which can make it difficult to operate them in band rig type environments. They dont respond to submaster faders etc and it is impossible to superimpose dimmer chases and the like on top of colour looks.
How about a freestyler/fixture creator feature which allows the user to define a "virtual" dimmer channel in fixture creator, which does not actually exist on the fixture itself. Freestyler could then scale the RGB values by the value of this channel, allowing full dimmer type functionality in the software, regardless of the channels on the fixture.
Does that sound feasible/desirable? I would think it would be a unique selling point for the software, I haven't seen it anywhere else and it could provide a lot more creative possibilities using the lower end fixtures that are common for freestyler users

Alternatively, does anyone know of a way of getting the same effect?

Sound good? B.