Compress baked PNGs and tighten XPbr shadows with URP quality tweaks.

Add png_compress to the model pipeline and update TownSquare lighting plus MaleExplorer/plaza textures.

Co-authored-by: Cursor <cursoragent@cursor.com>

Tools/model_tools/bl_bake.py

@@ -7,6 +7,7 @@ import os
 import sys
 
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+from png_compress import compress_png, prepare_blender_png
 
 DEFAULT_RAY_PCT = 0.02   # 测量失败时回退：低模包围盒对角线 * 2%
 RAY_SAFETY = 1.5        # 自适应射线安全系数（分离 P99 × 此值）
@@ -199,8 +200,10 @@ def _bake_pass(low, high, target_node, name, bake_type, size, colorspace,
     path = os.path.abspath(os.path.join(outdir, "%s_%s.png" % (stem, name)))
     img.filepath_raw = path
     img.file_format = 'PNG'
+    prepare_blender_png(100)
     img.save()
     bpy.data.images.remove(img)
+    compress_png(path)
     return os.path.basename(path)