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AnyImage/openspec/changes/archive/2026-09-17-refine-cutout-split-boundaries/proposal.md
nan 076a8c90f1 Add specifications for two-times upscale and unified depth plane features
- Introduced the two-times upscale specification detailing requirements for unified output, fixed model presets, arbitrary dimensions, and consistent job behavior.
- Added scenarios for existing models, repeated upscale, and handling of alpha preservation.
- Created the unified depth plane specification outlining geometry modes, stable interface, and asset evaluation.
- Defined scenarios for mode switching, relief and camera preservation, and validation of delivered assets.
2026-09-17 17:19:05 +08:00

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## Why
Depth Cutout 的 Split 新边界仍继承原 Balloon 厚度,容易膨胀成尖脊;Boundary Smooth 在锯齿三角形上可能翻面,进一步改变厚度方向。恐龙头骨实图实验已确认边界厚度收敛、切口圆润和薄厚度下减弱法向平滑的效果,需要将这些行为整理为正式节点实现。
## What Changes
- Split 后清理三个顶点都位于边界的三角面,降低锯齿切口的退化风险。
- 新切口的 Balloon 厚度在边界收敛为零,邻近区域逐渐恢复;Edge Round 同时控制新切口的圆润过渡。
- 法向平滑结果按厚度连续混合:薄厚度接近原法向,正常厚度恢复既有平滑效果,默认始终启用。
- 保留 Split Threshold、Boundary Smooth 及厚度、Edge Round 的实时调节,参数变化后重新计算边界与形状。
## Capabilities
### New Capabilities
- `cutout-split-boundary-shaping`:切口清理、边界厚度收敛、圆润过渡及厚度关联法向平滑。
### Modified Capabilities
## Impact
- `tools/nodes/groups/image_depth_cutout.py` 及必要的 `tools/nodes/common` 构建函数。
- `tests/tools/nodes` 的 Cutout、边界平滑及属性生命周期测试。
- `src/anyimage/assets/O_AnyImage.blend` 中的 Cutout 节点资产及对应加载版本。
- 基于当前工作区的边界深度平滑继续实施,保留已有修改。