Preview Feature ⚡🅡🅞🅣🅘

This pack's reactive system runs on FEATURE objects you mostly can't see - a curve of numbers driving a mask or a particle effect, invisible until it's already shaping your output. Preview Feature is the fastest way to actually look at one. Wire a FEATURE in, and it shows you what that curve looks like, right there in the node graph, without routing anything through a Save Image or a Preview Image node first.

How it's different from AnimatedFeaturePreview

The pack has two feature-inspection tools and they're not interchangeable. AnimatedFeaturePreview produces an actual IMAGE output - a scrolling line-graph render you route to a Preview Image or Save Image node, which is useful if you want to export the graph or composite it into something. Preview Feature has no outputs at all - it's a terminal node, the same category as ComfyUI's own PreviewImage: you wire something in, it renders directly in the interface, and that's the end of the line. If you just want a fast, no-setup look at a curve mid-graph, this is the lighter option; if you need the graph itself as a reusable image, use AnimatedFeaturePreview instead.

The inputs and outputs that matter

• feature (required, FEATURE) - the only input. No display options, no styling, nothing to configure.

No outputs - by design. You can't chain anything downstream of this node; it's meant to be a branch off your real workflow, not a step in it. Wire your actual FEATURE into whatever Flex target or FeatureToMask node needs it first, then optionally split a copy off to Preview Feature just to look at it.

How to install it

ComfyUI Manager: search "RyanOnTheInside", install, restart. Manually:

cd ComfyUI/custom_nodes
git clone https://github.com/ryanontheinside/ComfyUI_RyanOnTheInside
cd ComfyUI_RyanOnTheInside
pip install -r requirements.txt

then restart. This is a debugging/rendering utility on data you've already generated - no model download either way.

Common issues & troubleshooting

Nothing renders. Confirm feature is actually connected - this node has no fallback behavior and nothing to configure, so an unconnected input is the most likely cause if the node appears to do nothing.

Tried to wire something out of this node and couldn't. That's expected, not a bug - Preview Feature has zero outputs, it's a dead end by design. If you need the rendered curve to keep flowing through your graph (say, to composite it into a video), you want AnimatedFeaturePreview instead, which produces an actual IMAGE.

Curve looks flat and you expected variation. That's a signal, not a rendering bug - check the node actually feeding this feature input (an extractor, a combiner, an interpolator) for whether it genuinely has variation in it before assuming the preview itself is wrong.