Don't track lightmaps by name.

That's bugprone and can lead to pain.

korman/exporter/convert.py

@@ -56,6 +56,7 @@ class Exporter:
             self.image = image.ImageCache(self)
             self.locman = locman.LocalizationConverter(self)
             self.decal = decal.DecalConverter(self)
+            self.oven = etlight.LightBaker(self.report)
 
             # Step 0.8: Init the progress mgr
             self.mesh.add_progress_presteps(self.report)
@@ -126,10 +127,8 @@ class Exporter:
                 self.report.raise_errors()
 
     def _bake_static_lighting(self):
-        lighting_method = self._op.lighting_method
-        if lighting_method != "skip":
-            oven = etlight.LightBaker(self.report)
-            oven.bake_static_lighting(self._objects)
+        if self._op.lighting_method != "skip":
+            self.oven.bake_static_lighting(self._objects)
 
     def _collect_objects(self):
         scene = bpy.context.scene

korman/exporter/etlight.py

@@ -43,6 +43,7 @@ class LightBaker(_MeshManager):
         self.lightmap_uvtex_name = "LIGHTMAPGEN"
         self.retain_lightmap_uvtex = True
         self.force = False
+        self._lightmap_images = {}
         self._uvtexs = {}
 
     def __del__(self):
@@ -213,6 +214,9 @@ class LightBaker(_MeshManager):
             material.light_group = dest
         return shouldibake
 
+    def get_lightmap(self, bo):
+        return self._lightmap_images.get(bo.name)
+
     def get_lightmap_name(self, bo):
         return self.lightmap_name.format(bo.name)
 
@@ -282,7 +286,7 @@ class LightBaker(_MeshManager):
     def _pack_lightmaps(self, bake):
         lightmap_iter = itertools.chain.from_iterable((value for key, value in bake.items() if key[0] == "lightmap"))
         for bo in lightmap_iter:
-            im = bpy.data.images.get(self.get_lightmap_name(bo))
+            im = self.get_lightmap(bo)
             if im is not None and im.is_dirty:
                 im.pack(as_png=True)
 
@@ -337,6 +341,7 @@ class LightBaker(_MeshManager):
             # Force delete and recreate the image because the size is out of date
             data_images.remove(im)
             im = data_images.new(im_name, width=size, height=size)
+        self._lightmap_images[bo.name] = im
 
         # If there is a cached LIGHTMAPGEN uvtexture, nuke it
         uvtex = uv_textures.get(self.lightmap_uvtex_name, None)

korman/operators/op_lightmap.py

@@ -81,7 +81,7 @@ class LightmapAutobakePreviewOperator(_LightingOperator, bpy.types.Operator):
             if tex is None:
                 tex = bpy.data.textures.new("LIGHTMAPGEN_PREVIEW", "IMAGE")
             tex.extension = "CLIP"
-            image = bpy.data.images[bake.get_lightmap_name(context.object)]
+            image = bake.get_lightmap(context.object)
             tex.image = image
             if self.final:
                 lightmap_mod.image = image
@@ -126,7 +126,7 @@ class LightmapBakeMultiOperator(_LightingOperator, bpy.types.Operator):
         for i in filtered_objects:
             lightmap_mod = i.plasma_modifiers.lightmap
             if lightmap_mod.bake_lightmap:
-                lightmap_mod.image = bpy.data.images[bake.get_lightmap_name(i)]
+                lightmap_mod.image = bake.get_lightmap(i)
 
         return {"FINISHED"}
 

korman/properties/modifiers/render.py

@@ -463,14 +463,9 @@ class PlasmaLightMapGen(idprops.IDPropMixin, PlasmaModifierProperties, PlasmaMod
         if not self.bake_lightmap:
             return
 
-        if self.image is not None:
-            lightmap_im = self.image
-        else:
-            # Gulp...
-            lightmap_im = bpy.data.images.get("{}_LIGHTMAPGEN.png".format(bo.name))
-
         # If no lightmap image is found, then either lightmap generation failed (error raised by oven)
         # or baking is turned off. Either way, bail out.
+        lightmap_im = self.image if self.image is not None else exporter.oven.get_lightmap(bo)
         if lightmap_im is None:
             return
         mat_mgr = exporter.mesh.material