Optical Geometric Generator

The OpticalGeometricNode cranks out six kinds of geometric op-art - concentric squares, concentric triangles, a sine-distorted grid, a starburst, a honeycomb of hexagons, and superimposed waves. If you've ever wanted a "this would look great as a poster" background without leaving ComfyUI, this is the node. It's the visual-effects sidekick to the pack's simpler Pattern Generator: same idea, much more interesting output.

How it works

Straightforward PIL drawing, parameterized by frequency and line_width. The six pattern_type options are distinct algorithms, not variations on one theme:

• concentric_squares - nested squares marching in from the edges. The op-art classic.
• concentric_triangles - same idea, triangles.
• wavy_grid - a grid whose lines are bent by sine waves; this is the one that genuinely moves if you stare.
• starburst - lines radiating from the center, sunburst style.
• hexagons - a proper honeycomb lattice.
• waves - sinusoidal waves layered over each other, which reads as moiré when the frequency climbs.

Everything is drawn with color1 and color2 as the two-tone palette, so the output is clean two-color line art - ideal as-is, and a great base for further processing.

The inputs that matter

• pattern_type (default concentric_squares): the six above.
• size (default 512, range 128–2048): output is square.
• frequency (default 10, range 2–100): element density. On a 512px image, 10 gives you a comfortable number of features; crank it toward 100 and you get fine, busy line work. Low values give chunky, bold shapes.
• line_width (default 3, range 1–50): stroke thickness in pixels. This is the one that decides whether it looks like a poster or like a graph.
• color1 / color2 (default #FFFFFF / #000000): the two-tone palette, hex strings.

One IMAGE output (a square, remember - size sets both dimensions). Wire it to Save Image, use it as a background, or feed it into the autostereogram node as a pattern - geometric line art actually makes a great Magic Eye texture because it's full of parallax-revealing detail.

Install

It's in the orion4d/illusion_node pack, "ComfyUI Illusion & Pattern Nodes", under the "illusion" category. ComfyUI Manager (search "Illusion") or manual clone:

cd ComfyUI/custom_nodes
git clone https://github.com/orion4d/illusion_node.git

Restart and it's live. Requirements are numpy, torch, Pillow - all already in a stock ComfyUI. No models to download, no GPU requirements beyond what you already have.

Common issues

The one that confuses people is frequency - it's not a wavelength slider, it's a count, so "10" means roughly ten features across the image and "100" means a hundred. If your output looks too sparse or too dense, that's the knob. And because size forces a square, you can't get a 16:9 background directly - generate square and crop, or use a Resize node afterward. Line art at high frequency can also look muddy if the two colors are too close together; high-contrast pairs read far better.