Pipe Out Sampler Settings SGS (Flux)

The odd one out. Every other sampler Pipe Out in RvTools unpacks a sampler and a scheduler - this one doesn't. "Pipe Out Sampler Settings SGS (Flux)" hands back exactly five values: steps, cfg, flux_guidance, denoise, and seed. No sampler slot, no scheduler slot. If the initials bug you, SGS is the "steps / guidance / seed" reading of the pipe: the three things you actually change between runs, nothing else.

Why would anyone want a sampler pipe without a sampler? Because some workflows fix the sampler at the KSampler itself and only want the iteration knobs carried in the pipe. The sampler and scheduler become decisions you make once, in one place, and the things you're going to tweak over and over - step count, guidance strength, denoise, seed - travel as a tidy bundle. It's a smaller pipe, a smaller node, and a genuinely reasonable philosophy for a fixed-sampler Flux setup. Flux makes this workable because the sampler choice is narrow anyway: Euler-family on a conservative schedule, and after that the interesting dials are steps, guidance and seed.

Mechanically, nothing surprises here. One pipe input, the pipe passed through, each field split to its own output. The values come from the matching sampler-settings Pipe In node upstream; this node is pure relay. It pairs specifically with a pipe that carries the SGS shape - feed it a full NIS pipe and the tuple won't match.

For a beginner, this is also the easiest node in the family to reason about:

• steps - how many denoise steps. Flux tolerates low counts; distilled variants run 4-8.
• flux_guidance - Flux's guidance knob. Moderate values; more is not more.
• denoise - img2img strength, 0 to 1. Only relevant when starting from an existing image.
• seed - the variation dial. On the pipe so it stays with the rest.
• cfg - carried for pipe-shape compatibility; Flux mostly ignores it.

Installing it

It's part of ComfyUI-RvTools_v2. ComfyUI Manager: search "ComfyUI-RvTools_v2". Or:

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

Restart ComfyUI. Dependencies (torch, numpy, Pillow, opencv-python, pilgram, pynvml, piexif) install through Manager; no models, no keys.

Where people get burned

• No sampler output is a feature, not a bug. If you expected a sampler slot, you grabbed the wrong variant - the Small Flux pipe is the minimal one with sampler/scheduler.
• Pipe shape is king. This unpacker wants the five-field SGS pipe. Any other RvTools sampler pipe throws ValueError at queue time, since all pipes share the same wire type and ComfyUI can't type-check the difference.
• Deprecation. The RvTools v2 pack is unmaintained and the README points to the successor, ComfyUI_Eclipse. Fine to run; new builds should check Eclipse for an equivalent.