We strongly recommend that all 3.x users upgrade. In addition, we have shipped with this version a series of critical fixes, experience optimizations, and numerous documentation optimizations. The second is a series of built-in Surface Shader material resources, which will be the cornerstone of material customization in the future. The first is the Smart Material Conversion which permit to import DCC default materials from FBX, restoring the materials and appearance created by artist in various DCC tools. V3.5.1 adds two far-reaching experimental features without affecting the stability of the original functionality of V3.5.0. Add api doc for vertex format (engine#11394).Fix more API docs in core (engine#11338).Don't force top align for editbox's placeholder label (engine#11303).Fix websocket onError not call onClose on Android (engine#11441).Fix rendering bug caused by setUseBakedAnimation operation (engine#11267).Code format and add sliders for DCC material parameters (engine#11266).Fix specular params with toon surface (engine#11265).Fix isnan(0.0) issue in shader for glsl100 (engine#11262).Remove unnecessary data saving dialog when editing material in node inspector (engine#11284).Fix memory leak issue when switching scenes in editor (engine#11355).Fixed the problem that the script reading npm package did not correctly process the upper-level package.json, causing the reading to fail.Fixed the problem that the initialized width and height of the material preview are not integers, causing an error to be reported.Fixed an issue where an error might be reported when modifying properties of nested prefab.