Sketch ✒️🅝🅐🅘

SketchNAID is the messier sibling of the pack's LineArtNAID. Where lineart gives you clean edge extraction, this one pushes an image through NovelAI's hosted "sketch" tool - the loose, hand-drawn-looking treatment you get from the same button in the NovelAI web app. Same shape, rougher result: it's for when you want the feel of a concept sketch rather than a crisp blueprint of edges.

It's a director tool, which in this pack means it's an honest little API client for https://image.novelai.net/ai/augment-image. You give it:

• image - the source.
• limit_opus_free (on) - caps size at 1024×1024 and stays inside the free generation quota for Opus-tier accounts. Leave on unless you're deliberately paying for bigger input.
• ignore_errors (off) - swallow API failures and return a blank 1×1 instead of killing your queue.

One IMAGE comes out (and gets autosaved to output/NAI_autosave/). The node encodes your image to base64, posts it with req_type: "sketch", unzips the returned PNG, decodes it. All of it remote, all of it metered in Anlas, none of it touching your GPU.

Where it fits in a workflow: the sketch output is a great intermediate, not usually an endpoint. Feed it back into GenerateNAID as an img2img source with a low-ish strength and a prompt like "clean colored illustration" and you get a redraw that keeps the loose composition but tightens the finish. That two-step is the classic "sketch → render" loop, and this node just supplies the first half on NovelAI's servers instead of on your machine.

The honest caveats are the same ones you'd get from the web tool: the sketch filter is tuned for anime illustration, so photorealistic input comes back looking like a stylized mess, and it's a per-image paid call - fine for the images that matter, wasteful for batch sweeps. If you want a stronger, more predictable hand, LineArtNAID is the cleaner starting point; sketch is the characterful one.

Install: ComfyUI Manager → search "ComfyUI_NAIDGenerator", or clone into custom_nodes/ and restart. Your NAI_ACCESS_TOKEN goes in a .env in the ComfyUI root (the folder that holds custom_nodes/), not inside the node folder - the 401s people hit are almost always that file missing or holding an expired web-session token instead of a persistent API token.