Preview (CANVAS) only loads scene plus action-referenced frames, and drag edits stay in the codes until they are applied. Export renders the full scheduler timeline, so any mismatch between canvas codes and timeline codes appears only after render.
预览（CANVAS）只加载场景和动作引用的帧，拖动编辑要同步回代码才生效。导出渲染的是完整调度时间轴，所以画布代码与时间轴代码不一致时，只有渲染后才看得出来。
1. In CANVAS, drag characters to fine-tune dx/dy, edit rot/scale, then confirm changes sync back into the codes.
1. 在 CANVAS 拖动角色微调 dx/dy，编辑 rot/scale，确认改动同步回代码。
2. Open SG and check every part's Part ID, Parent ID, Layer and Z-perspective match what the action expects.
2. 打开 SG，核对每个部件的 Part ID、Parent ID、Layer、Z-perspective 与动作预期一致。
3. Open AG and verify each action unit's seq frame ranges match the target part's numbered states; run auto-suggest sequence if unsure.
3. 打开 AG，确认每个动作单元的 seq 帧范围匹配目标部件的编号状态；不确定就运行自动建议序列。
4. Open AC and confirm the event placement on L1/L2/L3/L4 matches the camera, role, scene and audio timing you previewed.
4. 打开 AC，确认 L1/L2/L3/L4 上的事件位置与你预览的镜头、角色、场景、音频时间一致。
5. Run whole-project validation; fix every red input hint and every item in the clickable error list.
5. 运行整项目校验，修掉所有红色输入提示和可点击错误列表中的每一项。
6. Confirm the rest-fill prompt before render, then render to MP4 in portrait 720x1280 or landscape 1280x720.
6. 渲染前确认补休提示，然后按竖屏 720x1280 或横屏 1280x720 渲染 MP4。
Try the 3SAX V3 creator tool and render a one-sentence clip to compare preview and output yourself.
来试试 3SAX V3 创作工具，用一句话生成片段，自己对比预览与导出结果。