Allow user to opt-out of vertex shading

korman/operators/op_export.py

@@ -41,6 +41,10 @@ class ExportOperator(bpy.types.Operator):
                                                 "description": "(Re-)Bake all lightmaps on export",
                                                 "default": True}),
 
+        "regenerate_shading": (BoolProperty, {"name": "Regenerate Vertex Shading",
+                                              "description": "(Re-)Bake all vertex shading on export",
+                                              "default": True}),
+
         "version": (EnumProperty, {"name": "Version",
                                    "description": "Version of the Plasma Engine to target",
                                    "default": "pvPots",  # This should be changed when moul is easier to target!
@@ -57,6 +61,7 @@ class ExportOperator(bpy.types.Operator):
         # The crazy mess we're doing with props on the fly means we have to explicitly draw them :(
         layout.prop(age, "version")
         layout.prop(age, "regenerate_lightmaps")
+        layout.prop(age, "regenerate_shading")
         layout.prop(age, "profile_export")
 
     def __getattr__(self, attr):

korman/operators/op_lightmap.py

@@ -242,7 +242,11 @@ class VertexColorLightingOperator(_LightingOperator, bpy.types.Operator):
             # old copy of the autocolor layer on the mesh. Nuke it.
             autocolor = vcols.get("autocolor")
             if autocolor is not None:
-                vcols.remove(autocolor)
+                if context.scene.world.plasma_age.regenerate_shading:
+                    vcols.remove(autocolor)
+                else:
+                    # we have autocolor already, don't regenerate it because they don't want it
+                    return {"CANCELLED"}
             autocolor = vcols.new("autocolor")
             toggle.track(vcols, "active", autocolor)