Sampler Settings (Flux)

The other Flux settings nodes in this pack assume you're doing plain text-to-image. Sampler Settings (Flux) is the one for when you're not. It bundles sampler, scheduler, steps, CFG, Flux guidance, denoise, a sigmas-denoise offset, and a noise-strength control into a single pipe - the advanced member of the family, aimed at img2img, upscaling passes, and Flux workflows that want finer control over how noise is introduced and removed.

What's in the bundle

• Sampler (44 options) and Scheduler (16 plus AYS/OSS/Wan extras) - the standard lists.
• Steps (default 20) - 20–30 for Flux dev, 4–8 for distilled.
• CFG (default 3.5) - the field Flux mostly ignores; present for compatibility.
• Flux_Guidance (default 3.5) - the parameter that actually steers Flux.
• Denoise (default 1.0, range 0–1) - the img2img knob. 1.0 means full generation from noise; lower values keep more of the source latent. This is what you'd set to 0.4–0.6 for an upscale pass.
• Sigmas_Denoise (default 0.45) - a sigma offset for where in the schedule denoising effectively starts. Lower values start from a less-noisy state, which changes how much "fresh" detail the model paints. This is the advanced knob; most people will leave it alone until they're chasing a specific look.
• Noise_Strength (default 0.5) - how much noise gets added back when you're not denoising from pure noise. Pair this with denoise: it governs the strength of the noise that re-enters the latent, and it's a big lever for consistency in upscale/img2img chains.

All eight go into a list and come out as one pipe. Pair it with Pipe Out Sampler Settings (Flux) (same pack), which unpacks into individual wires - sampler, scheduler, steps, cfg, flux_guidance, denoise, sigmas_denoise, noise_strength - for your KSampler. The pipe is the pack's own convention, so the matching Pipe Out node is mandatory.

How it fits with the other Flux settings

Lay the family out and it's a clear ladder. Small (Flux) = five numbers, text-to-image only. Flux+Seed = adds denoise + seed for img2img with reproducibility. This one = adds sigmas denoise and noise strength on top of denoise, for people who want the full advanced control surface. If you're mostly doing T2I, this is overkill - the Small version keeps your graph cleaner. If you live in img2img and upscale chains, the extra knobs are exactly the ones you'd otherwise be adding separate nodes for.

Installing it

Part of ComfyUI-RvTools_v2 - Manager → search "ComfyUI-RvTools_v2", or:

cd ComfyUI/custom_nodes
git clone https://github.com/r-vage/ComfyUI-RvTools_v2
# restart ComfyUI

No models to download.

Gotchas

Defaults are Flux-flavored (CFG 3.5 is wrong for SDXL - raise it there). And with three advanced fields (denoise, sigmas, noise strength) it's easy to pull several levers at once and not know which one changed your result - change one at a time. Pack-level caveat as always: RvTools_v2 is unmaintained in favor of ComfyUI_Eclipse, and the [RvTools] name suffix is why Manager sometimes misses nodes in older shared workflows.