📜 CR Float Range List

The float cousin of CR Integer Range List, with a twist worth caring about. CR Float Range List generates a list of decimals - start, end, step - but it can also run each value through a trig function on the way out. That makes it two tools in one: a plain parameter sweeper for things like CFG, denoise, and LoRA weight, and a curve generator for animation schedules where you want smooth oscillation instead of a linear ramp.

For the everyday case, it's simple: sweep denoise from 0.3 to 0.7 to find where your img2img holds detail, or walk CFG across a range to see where a checkpoint stops looking baked. Because the output is a list, ComfyUI runs the graph once per value automatically - you queue once and get the whole spread.

How it works

It builds the sequence from start to end by step, rounds each value to decimal_places, and optionally applies operation - sin, cos, or tan - to every value. That trig option is the interesting bit: a sine curve gives you a value that eases up and back down, which is what you want for a smooth animated parameter (think a weight that breathes in and out over frames) rather than a straight line. ping_pong walks the range up then back down; loops repeats the whole thing; max_values_per_loop caps how many values a single loop emits so a tiny step doesn't explode into thousands. ignore_first_value (on by default) drops the leading value, which is handy when your start point is a throwaway.

The inputs and outputs that matter

• start / end / step - the range and increment. Small steps = long lists.
• operation (none / sin / cos / tan) - leave at none for a plain sweep; use sin/cos for animation curves.
• decimal_places - rounding. 2 is plenty for most weights.
• ping_pong (boolean) - bounce back down for oscillating sweeps.
• loops and max_values_per_loop - repeat count and a safety cap on list length.
• ignore_first_value (boolean) - skip the first value.

Outputs:

• FLOAT - the list of floats; wire into any float input (denoise, CFG, weight) and it fans out.
• show_help - wiki link, ignore.

How to install it

Comfyroll Studio (Suzie1 and RockOfFire), a mature utility pack - no models, no heavy dependencies.

• ComfyUI Manager - search Comfyroll Studio, install, restart.
• Manual - cd ComfyUI/custom_nodes && git clone https://github.com/Suzie1/ComfyUI_Comfyroll_CustomNodes.git, then restart.

Also on CivitAI.

Common issues

Watch the list length. A step of 0.01 over a range of 0 to 10 is a thousand values, and every one triggers a full run - max_values_per_loop exists precisely to stop that, so lean on it. The other subtlety is the trig option: when operation is sin/cos/tan, the output values are the result of that function, not your raw range, so don't be surprised when a 0–1 range comes out as numbers between -1 and 1. That's the feature, not a glitch - just know it's happening.

If the node's missing entirely, that's the pack-wide load failure: Comfyroll Studio: Failed to load ... and NameError: name 'CR_HalftoneGrid' is not defined. The NameError is a symptom of a real import error (usually an incompatible Pillow version from another node) that can down the whole pack. Reinstall Pillow (pip install --upgrade --force-reinstall pillow) and restart.