Sampler Settings SGS (Flux)

If the NIS variant is the full-dress Flux settings node, Sampler Settings SGS (Flux) is the stripped-down daily driver: five values, no sampler or scheduler dropdown, one pipe output. It's for the Flux workflow where you've already settled on your sampler and scheduler elsewhere and just want steps, CFG, guidance, denoise and seed parked in one tidy node. Honestly, for a lot of plain Flux runs this is the one you'll actually reach for - the NIS version's extra noise controls are niche.

How it works

Same pipe mechanism as the rest of the RvTools sampler-settings family. This node packs five values into a Python-tuple pipe:

• Steps (default 20)
• CFG (default 3.5)
• Flux_Guidance (default 3.5) - the value that actually steers Flux; remember Flux treats CFG and guidance as separate knobs, and guidance does the real work.
• Denoise (default 1.0, 0–1) - drop it below 1 for img2img-style refinement passes.
• Noise_Seed (default 0) - a full 64-bit range with control_after_generate, so it re-rolls per generation like you'd expect.

The matching Pipe Out Sampler Settings SGS (Flux) node unpacks the tuple back into steps, cfg, flux_guidance, denoise, seed typed outputs for wiring into your KSampler and Flux guidance nodes.

The inputs that matter

There are only five, listed above, and the only one beginners get wrong is CFG vs Flux_Guidance. On Flux you usually leave CFG at 1.0 and set Flux_Guidance somewhere around 3.5 - pushing CFG up on Flux is a classic way to get blown-out, oversaturated images. This node defaults CFG to 3.5 which is fine for SDXL-style use but worth dialing down if you're on pure Flux.

Installing it

ComfyUI Manager → search ComfyUI-RvTools_v2, install, restart. Manual:

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

No model downloads; requirements are already covered by a stock ComfyUI environment.

Gotchas

The usual RvTools caveats apply: the pack is unmaintained (superseded by ComfyUI_Eclipse), and v2 renamed every node from the original ComfyUI-RvTools v1, so legacy workflows report missing nodes. One node-specific trap: pair the Settings SGS node with the SGS Pipe Out variant only. If you connect it to the NIS or Small Pipe Out node you'll get a tuple-length error ("not enough values to unpack") because the three variants pack different numbers of values - SGS packs 5, NIS packs 9, Small packs 4. Keep the pair matching and you'll never see it.