ScrapCraft
Snap a photo of your 3D printer scrap bin and get curated project ideas—garden mosaics, planters, organizers—sized to the colors, plastic types, and quantities you actually have.
3D printing hobbyists with bags of failed prints and supports
- Photo-based scrap classifier that identifies plastic type, color, and shape from failed prints and purge towers
- Project recommender that matches your scrap inventory to step-by-step DIY builds with estimated print-free time
- Material yield calculator that flags which scraps are worth keeping for which categories of projects
- Community gallery of upcycled builds with reverse-changelogs showing which waste streams they absorbed
3D printer ownership is mainstream but the waste side-stream is silently filling garage shelves; the HN trend shows there's real appetite for visible, satisfying ways to deal with it.
Real but modest interest: the source Instructables 'Koi Pond Mosaic' only scraped 7-21 HN points, while Cults3D hosts 8.1k recycling/upcycling files and MakerWorld runs a dedicated '3D Printer Waste Ideas' collection — niche hobbyist demand, not a burning pain.A Koi Pond Mosaic Made from 10 Pounds of 3D Printer Waste | Hacker News Remix ↗3D Printer: Waste Ideas | Collection - MakerWorld ↗
No direct photo-input competitor found; existing substitutes are static guides (Instructables, 3D-Printed.org, Spoolhound) and STL libraries (Cults3D's 8.1k recycling/upcycling files) — wide whitespace for an AI-photo tool, but content sites already serve the 'ideas' half.3D Printer Waste: 9 Ways to Recycle (2026) - 3D Printed ↗Recycling & Upcycling - Cults3D ↗
3D printing hobbyists are notoriously frugal and abundant free content exists (Instructables walkthroughs, free STL files on Cults3D/MakerWorld, blog guides) — a photo-to-ideas utility is a 'nice-to-have' that's hard to justify as a recurring subscription.A Koi Pond Mosaic Made From 10 Pounds of 3D Printer Waste ↗3D Printer Waste & Recycling Guide - Spoolhound ↗
3D printer ownership is still growing, sustaining the underlying pool of waste, but this app is a low-frequency, episodic tool (you snap your bin once every few months) — shallow retention and easy to be replaced by a Reddit thread or one Instructables read.
Generating project ideas from a photo is easy with a multimodal LLM, but reliably distinguishing PLA vs PETG vs ABS from RGB and estimating actual piece counts/volumes in a cluttered bin is genuinely hard CV — the 'sized to quantities you actually have' promise is the weakest link.