Joint Alignment for Optimized BlendShape Performance and Expression Refinement

### **Reposition Joints** Adjust the joints of the current facial expression to match the shape of the selected model. Using the **Blend Selected Target** function alone ensures that the expression shape remains consistent. However, excessive **BlendShape (BS) deformation increases vertex interpolation calculations**, leading to higher performance costs. Additionally, directly blending the BS does not align with the current **facial control rig and joint positions**, making further expression refinements—especially corrective adjustments—more challenging. This feature introduces an alternative approach to facial expression refinement: **instead of relying solely on BS deformation, users can sculpt the model to refine expressions and then bake the BS shape into the DNA-driven joint transformations**. This method **reduces BS computation overhead** while improving animation fidelity. It can also be used to enhance **lower LOD expressions without BS, making them more closely resemble LOD0**, ensuring greater facial consistency across different LOD levels.