This is the first attribute visualizer built entirely in Geometry Nodes. It works with any float number range, works extremely fast (it only generates instances), and is also renderable. The node group might come in handy for a lot of possibilities, I only have demoed some of them in this video. I've made a detailed explanation of how this works in this video, this file is meant for everyone who needs to grab it instead of building their own version, and also for all who wish to support my efforts of making other free Geometry Nodes tutorials. I've added some additional features to the setup making it easier to work it.