每月不到一卷耗材的钱。

Yes. On Maker, Pro and Business, credits you don't use roll into the next month, and each month's credits stay yours for 6 months. They need an active plan: if a renewal payment doesn't go through, saved credits are lost, so we email you first and fixing it takes a minute. The 12 Free credits are a one-time start, not a monthly refill.

Your design stays open and everything that runs on your computer keeps working: sliders, checks, test pieces and downloads. Only new design work waits for credits. On a paid plan you can add a credit pack, or move up a plan in one click: you pay the difference for the rest of the month and get the extra credits right away.

Yes, from Plan & credits in your account. You keep your plan and can use your credits until the end of the period you paid for, and your projects stay yours.

Credits pay for design time: the work of turning your description into a checked, parametric model. A simple part (hook, clip, box) takes about 6–10 credits: a plan, a build and often a fix. An enclosure takes about 15–25, and a 15-part assembly like the flying wing 250–300. Before you send a message the Studio shows what it usually costs, you get a receipt after, and you can stop any time; if one message runs well past its usual cost, it pauses and asks before going on. Moving sliders and re-exporting is always free because it runs in your browser.

文字生成 3D 工具雕出的是看起来对的网格。Loftsmith 构建的是尺寸对的零件：它编写参数化 CAD，使用真实的五金尺寸（螺丝、热熔螺母、轴承、电路板），针对你的打印机检查热床尺寸、悬垂和薄壁，并在打印前做弯曲应力、倾倒等工程校验。

所有 FDM 打印机。选择一个配置（拓竹 Bambu Lab、Prusa、创想三维、Voron 等）或通用热床尺寸；零件会对照其成型尺寸校验，放不下时会分割并加上定位销。

归你。付费方案包含你设计和打印的所有东西的商用权，你可以出售自己做的产品。

STL per part and 3MF with every part laid out on a plate. Your design stays in your projects, so you can reopen it and change it any time. STEP export is in beta on Pro.

枪械、枪械零件和武器配件。其他功能性且合法的东西——工具、支架、外壳、航模和无人机零件、治具和夹具——都可以。