Add a function kinda like in the Render Clear Screen "Clear only 1st frame" to the effect list: "Draw only 1st frame". This would allow complex static patterns/textures for presets with very low fps cost. You can already do this with two effect list's and a custom bpm, but then it will draw the effects in the effect list again every X beat. With low fps you can notice this as the preset "stops" for that 1 frame as it draws it again, this is pretty annoying as you watch the preset for a longer time.
I really think this would be useful as you could for example, draw a very smooth & accurate circle with a render clear screen and a 200x200 Alpha blend Dynamic movement
Just an idea.