Create feedback network
create_feedback_networkBuild a visual feedback loop in TouchDesigner: feed a seed image through a chain of effects (blur, displace, etc.) with decay to create evolving visuals.
Instructions
Build a feedback-based visual system: a seed feeds a loop that is transformed (blur/displace/etc.) and fed back each frame. Creates a new baseCOMP under parent_path holding the seed, a Feedback TOP, a 'maximum' Composite, the transform chain, a Level decay node, an optional GLSL colorize pass, and a Null output (the Feedback TOP samples the Level node to close the loop). Great for evolving, hypnotic visuals. Exposes a live 'Feedback' decay knob. Returns a summary plus a JSON block with the container path, created node paths, the output path, exposed controls, any node errors, warnings, and an inline preview image. Use this for a general feedback look with a chosen seed type and an ordered chain of effects; for the specific infinite-zoom/rotate spiral (with Zoom/Rotate/HueShift/Decay knobs) use create_feedback_tunnel instead.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| colors | No | Up to two hex colors ('#rrggbb') used to colorize the otherwise-grayscale output via a final GLSL gradient (one color = black→color, two = color0→color1). Omit to leave it grayscale. | |
| seed_type | No | What feeds the loop each frame: 'noise' (monochrome Noise TOP), 'shape' (Circle TOP), 'image'/'video' (Movie File In TOP), 'webcam' (Video Device In TOP — may prompt for camera permission), or 'glsl' (a generative shader). Default 'noise'. | noise |
| parent_path | No | Parent network where the feedback container is created (default '/project1'). | /project1 |
| feedback_gain | No | Loop decay multiplier (0–1) applied via a Level TOP's brightness1: how much of the fed-back frame survives each cycle. Higher = longer-lived, more saturated trails; default 0.95. | |
| expose_controls | No | When true (default), expose a live 'Feedback' knob on the system container, bound to the loop's decay. | |
| transformations | No | TOP effects applied in order inside the loop each frame (blur, displace, edge, level, hsv_adjust, transform, mirror, tile, luma_blur). Default ['blur','displace','level']. |