karel martens inspired line dithering in touchdesigner | tutorial

karel martens-inspired line dithering in touchdesigner | tutorial in this touchdesigner tutorial, we’ll build a karel martens-inspired line dithering effect using geometry instancing. instead of applying dithering directly to pixels, we’ll use the image as a blueprint, convert its pixel brightness into luminance data, and use that data to control the scale of thousands of instanced lines in 3d space. by the end of this tutorial, you’ll know how to turn any image or video into a sharp, scalable line-based composition, and you’ll understand how the full network works from first principles. you’ll learn: geometry-instanced dithering — how to rebuild an image using instanced 3d shapes instead of existing pixels. luminance-driven scaling — how to use the brightness of each pixel to control the size of each line. one-to-one sample matching — how ratio, downsampling, and grid resolution work together so the image does not stretch or break. grid density control — how to control the number of points across the screen and automatically calculate the matching rows. top to chop workflow — how to extract RGB data, average it into luminance, and use it as scale data. downsampling logic — why the downsampled image and the grid need to have the same sample count. geometry instancing setup — how to place lines onto a grid and scale them using image brightness. composition variations — how to combine the line render with mono color, overlay, background color, and layout techniques to create different graphic results. 00:00 – intro 00:42 – the core idea behind geometry-instanced dithering (ratio, downsampling, and grid matching) 04:46 – building, step1: using luminance to control line scale 06:11 – building, step2: set up grid density control 08:44 – building, step3: setting up geometry instancing 10:01 – fixing common sample mismatch mistakes 11:48 – camera and render setup 12:04 – creating final composition variations inspiration: karel martens’ graphic pattern and print work 📁 commercial-use project file: https://www.patreon.com/posts/karl-ma... 📁 free audio-reactive component: https://www.patreon.com/posts/audio-r... audio reactive tutorial    • audio-reactive light gradient effect in to...      • audio-reactive light dispersion effect in ...      • audio-reactive light spectrogram effect in...      • audio-reactive pixelated blocky effect in ...      • audio-reactive psychedelic spiral effect i...   if this helped, like and subscribe. drop a question in the comments if anything wasn't clear — and let me know what tutorials or effects you want to see next. see you in the next one. #touchdesignertutorial #generativedesign #creativecoding #proceduralart #dithering #geometryInstancing #karelmartens #visualart #motiongraphics #pixelstudy #glitchart #pixelart #audioreactive #generativeart #generativegraphics