IAMCCS Influencer Sampler

If you've been anywhere near flow-matching workflows in the last year you've seen the RES4LYF sampler names - exponential/ddim, exponential/res_2s, the beta57 schedule - and you've probably also seen the license rider that makes hosting services twitch. This node is IAMCCS's answer: a clean-room sampling bridge that exposes the same profiles the Influencer apps use, but built entirely on ComfyUI's public sampling API. The module header says it in so many words: it does not import, vendor, or execute RES4LYF code. Same flavor, no AGPL-with-a-commercial-rider dependency.

The hook is the four sampler profiles, sampler_name: linear/euler (the default, for the first creative pass), exponential/ddim and exponential/res_2s (the edit/reference workflows), and exponential/res_4s_munthe-kaas - the app's high-order refinement profile, implemented internally via ComfyUI's maintained res_multistep_ancestral. The docstring is admirably honest that it does not claim bit-identical output to the third-party implementation - it's the same solver family, not the same code. On the scheduler side you get the full modern list including beta57 and bong_tangent, both RES4LYF-borrowed names that flow-matching users expect to see.

Now the inputs that matter:

• steps (15 default) and steps_to_run (-1 = run all). steps_to_run is the underrated one: set it to a small number to cheaply preview the first few steps of a profile before committing.
• denoise (1.0) and cfg (1.0) - this is a flow-matching-era sampler, so the defaults are honest. cfg 1.0 is normal here.
• eta (0.5) - the tooltip calls it "ancestral noise strength for the refinement profile." Only the ancestral/res_4s route really hears it.
• seed with control_after_generate - standard.
• sampler_mode has exactly one choice (standard) - a compatibility seam, not a feature. Ignore it.
• bongmath (default true) - a BOOLEAN whose tooltip says "Compatibility field retained for saved IAMCCS settings." It does literally nothing in the code. Leave it on; it exists so old saved workflows load without JSON surgery.

Optional inputs are model, positive, negative, latent_image, sigmas, guides, options - the standard sampler contract, and it validates that model/positive/negative/latent are all present before running. Outputs: output (the sampled latent), denoised (the last clean x0, useful for previews), and options (an OPTIONS dict that records which profile/scheduler/steps actually ran - handy for provenance when you're comparing profiles).

Installation is pack-standard (search IAMCCS in ComfyUI Manager, or clone into custom_nodes, restart). It has no dependencies beyond ComfyUI itself - no RES4LYF install needed, which is the entire point.

The honest takes: if you already run RES4LYF and love its 69-solver menu, this node isn't trying to replace it - it's a four-profile compatibility surface for the Influencer apps. And exponential/res_4s_munthe-kaas being mapped to res_multistep_ancestral means "same spirit, different implementation" - expect visually equivalent results, not pixel-identical ones. For anyone who just wants the beta57 schedule in a no-fuss node, though, this gets you there with none of the licensing questions.