Subreddit rules check
r/3dprinting
Can you promote here?
The rules clearly permit sharing your own product or project. Follow the format norms below, disclose that it is yours, and lead with substance: allowed is not the same as welcomed for low-effort pitches.
From the rules · Use the stickied purchase-advice thread; first-layer and spaghetti posts are limited to specific days, and self-promotion must remain under the sub’s 10% rule.
Links
The rules clearly allow links. A plain-text mention still often outperforms a URL from a young account.
What this community rewards
Dominant post formats: showcase, discussion, guide
Headline: short and specific (e.g., “I printed/designed X” or “How I fixed Y”). Write in first person for projects/updates; include multiple photos, printer/specs, slicer/settings, and any STL/files or links. Typical length: brief post body with images and useful details. Tone: practical, helpful, enthusiastic and a bit technical. Upvotes reward clear photos, useful build notes or free files; avoid memes, dangerous instructions, or blatant spam.
Arriving in the local format matters: cross-posting the same text everywhere reads as tourist instantly. The wider method is in the Reddit playbook.
Classified mechanically from the community's published rules and recent top posts, last checked August 2026. Rules change and moderators have the final say: verify at r/3dprinting's rules page before posting anything that matters.
Thread Otter checks this before every send
These profiles power the product: promo-banned communities never receive a promotional draft, drafts arrive in the local format, and a fact-check gate plus human pacing protect the account doing the talking.