Hi Jack,
The renders are looking good and the use of colours certainly adds 'mood' to the scene. I noticed your use of coloured lights in the initial world globe images and they look good.
As to the number of users on the forum - there are a lot but most come a few times and go again. I suspect they buy the software basically to design or remodel their house or a room. Once the job is done, it has served its purpose. Unless users are regularly producing visualisations for some special purpose, like I do, or have some commercial use for it, they do not have much reason to keep using it other, than as a hobby when they have the time.
With Envisioneer, being so mujch more expensive, it is more likely used by builders/architects for commercial reasons, hence has regular use and reasons to visit the forum. Even so, on the Envisioneer forum, it is still a basic core of regular users, although a larger number than TFP.
Talking about stage lighting, are you planing to cover the use of 'up lights' in your videos? I had great difficulty getting the uplights on this stage image to work. It only seemed to want to do it one at once. In the end I gave up and copied the one that worked into the other three places using PaintShop Pro.
When the real stage was built, the flood lights were OK the night before, but in the day time, when the crowds arrived, the sunlight through the roof (it is some sort of fabric and inflated) completely overpowered the uplights anyway, so I needn't have bothered trying to demonstrate the effect in TFP in the first place! I had thought of using coloured floodlights to create effects for this stage design that I do regularly in this stadium, but following this experience I gave up on that idea! It would be OK if the program was at night time, but it would require extremely bright lights to compete with the sunlight (as we even know from TFP!!).
Allan