The single most common mistake here: after configuring the name/description/icon, you have to click Apply Changes, then exit the menu with X — but that only saves the blueprint's metadata, not the blueprint itself. To actually write the blueprint to disk you must press the separate Save Blueprint button before leaving the Designer, or your work is lost.
## Organizing dozens of blueprints before it gets out of hand  The blueprint you just saved gets filed into a directory — either an "Undefined" catch-all or a category you create. It's worth creating categories from the start: one save file can easily accumulate over a hundred blueprints (the video's presenter mentions having 120+ in a previous save with no organization), and sorting that after the fact is far more tedious than tagging as you go. Good starter categories to create: foundations, factory lines, railways/highways, and load balancers — then split each into subcategories as it grows.  You can also hover any blueprint (or color swatch) and press a number key to bind it straight to your hotbar, then hold E to cycle other items in the same category — handy for switching between a handful of blueprints you're placing repeatedly without reopening the menu each time.  ## Placing blueprints: build modes and the belt/pipe limitation  Building the contents of a blueprint from ground level is awkward — the recommendation is to use a Watchtower for a top-down view, or the Hover Pack with power placed at each corner, so you can see the whole footprint while you work.  When placing a saved blueprint in the world you get two build modes: **Blueprint mode**, which snaps to the edges of other blueprints and foundations for tight, aligned placement, and **default mode**, which gives full freedom to nudge it anywhere (hold H to toggle nudge, then use the mouse to fine-tune, holding Control for finer 50 cm increments instead of a full meter).Conveyor belts, pipes and rails do not connect automatically across a blueprint boundary. You cannot place a belt against the edge of one blueprint and expect it to auto-connect to the next — every cross-blueprint connection has to be built and connected manually.
## Building a curved blueprint for trains and highways  A gentle 5° curve (the video's presenter switched from 10° to 5° for a cleaner look) is the go-to for train tracks and highways, because it's shallow enough to snap together smoothly over a long run. Build it on a rotated foundation corner, using 1-meter walls along the inner and outer edges as a barrier — one side left as bare metal, the other painted, purely for visual contrast. Curved blueprints are **directional**: a right curve and a left curve are two separate saved blueprints, because their vertices don't mirror correctly if you just try to flip one. Chaining two curved blueprints edge-to-edge naively creates a visible straight seam between them, because each piece includes a straight foundation segment at its edge. The fix: go back into the Blueprint Designer, cut the leading foundation off the curve, and save that trimmed version separately as a "continued curve" piece — placing that between curve segments removes the seam.
To line pieces up cleanly, either rebuild using the exact same foundation depth as your first piece (e.g. consistently 4 m foundations), or nudge the new piece onto the existing foundation and let it seat naturally.  ## How this guide was fact-checked Unlock tiers (Mk.1 at Tier 4, Mk.2 at Tier 6, Mk.3 at Tier 9) and the exact buildable volumes (32 m/40 m/48 m cubes) were cross-checked against the current Satisfactory Wiki (wiki.gg), which was reachable and returned full content. The wiki's dimensions supersede anything implied on-screen in the source video, since the video (Update 1.0, 2024-09-29) covers Mk.1 in detail but doesn't show Mk.2/Mk.3 construction directly. Every workflow step — naming, the Apply Changes vs. Save Blueprint distinction, category/subcategory organization, blueprint build mode snapping, the belt/pipe/rail non-connection limitation, and the curved-blueprint technique — comes directly from frames pulled from the source video and the cleaned auto-caption transcript, cross-referenced against each other for consistency. ## What this guide doesn't answer This guide doesn't cover blueprint **sharing** between players or across saves (the Keywords list for this topic includes "satisfactory blueprint sharing," but the source video only covers designing and organizing blueprints within a single save, not exporting or importing blueprint files) — that process depends on locating the game's BP save folder and is better suited to its own guide. It also doesn't cover the exact resource cost of building a Blueprint Designer itself, since the video treats that as assumed knowledge; see the Cost panel in-game when placing one, or the wiki's construction cost table, for current figures. --- ## FAQ ### What tier unlocks the Blueprint Designer in Satisfactory? The Blueprint Designer Mk.1 unlocks with the FICSIT Blueprints milestone at Tier 4, giving a 32 m × 32 m × 32 m buildable volume. Mk.2 unlocks at Tier 6 (40 m cube) and Mk.3 at Tier 9 (48 m cube), each expanding how much you can fit inside a single blueprint. ### How big can a Satisfactory blueprint be? It depends on which Blueprint Designer tier you've unlocked: Mk.1 gives a 32×32×32 m volume, Mk.2 (Tier 6) gives 40×40×40 m, and Mk.3 (Tier 9) gives 48×48×48 m. These are the current figures from the Satisfactory Wiki, since sizes have expanded since earlier updates. ### Why won't my conveyor belt connect between two blueprints? Conveyor belts, pipes and rails never auto-connect across a blueprint boundary in Satisfactory. Placing a belt against the edge of one blueprint does not link it to the belt in the next blueprint — you always have to build and connect that final segment manually. ### How do I save a blueprint without losing my work? After naming and setting up your blueprint, click Apply Changes — but that only saves the metadata, not the blueprint itself. You must also press the separate Save Blueprint button before exiting the Designer, or your build is lost when you leave. ### How do you build a smooth curve for train tracks with blueprints? Save a shallow 5° curved blueprint (gentler than 10°, which looks blocky), and save separate left and right versions since curves are directional. To chain multiple curves without a visible straight seam, trim the leading foundation off a curve piece and save that as a separate continued-curve blueprint.