diff --git a/korman/exporter/etlight.py b/korman/exporter/etlight.py
index 119242b..fec2c2f 100644
--- a/korman/exporter/etlight.py
+++ b/korman/exporter/etlight.py
@@ -51,9 +51,12 @@ class LightBaker(_MeshManager):
 
     def _apply_render_settings(self, toggle, vcols):
         render = bpy.context.scene.render
-        toggle.track(render, "use_textures", False)
+
+        # Remember, lightmaps carefully control the enabled textures such that light
+        # can be cast through transparent materials. See diatribe in lightmap prep.
+        toggle.track(render, "use_textures", not vcols)
         toggle.track(render, "use_shadows", True)
-        toggle.track(render, "use_envmaps", False)
+        toggle.track(render, "use_envmaps", True)
         toggle.track(render, "use_raytrace", True)
         toggle.track(render, "bake_type", "FULL")
         toggle.track(render, "use_bake_clear", True)
@@ -243,6 +246,18 @@ class LightBaker(_MeshManager):
         modifier = bo.plasma_modifiers.lightmap
         uv_textures = mesh.uv_textures
 
+        # Previously, we told Blender to just ignore textures althogether when baking
+        # VCols or lightmaps. This is easy, but it prevents us from doing tricks like
+        # using the "Receive Transparent" option, which allows for light to be cast
+        # through sections of materials that are transparent. Therefore, on objects
+        # that are lightmapped, we will disable all the texture slots...
+        # Due to our batching, however, materials that are transparent cannot be lightmapped.
+        for material in (i for i in mesh.materials if i is not None):
+            if material.use_transparency:
+                raise ExportError("'{}': Cannot lightmap material '{}' because it is transparnt".format(bo.name, material.name))
+            for slot in (j for j in material.texture_slots if j is not None):
+                toggle.track(slot, "use", False)
+
         # Create a special light group for baking
         if not self._generate_lightgroup(bo, modifier.lights):
             return False
@@ -357,7 +372,7 @@ class LightBaker(_MeshManager):
             for i in bpy.data.objects:
                 if i == objs:
                     # prevents proper baking to texture
-                    for mat in i.data.materials:
+                    for mat in (j for j in i.data.materials if j is not None):
                         toggle.track(mat, "use_vertex_color_paint", False)
                     i.select = True
                 else:
@@ -370,7 +385,7 @@ class LightBaker(_MeshManager):
                 value = i in objs
                 if value:
                     # prevents proper baking to texture
-                    for mat in i.data.materials:
+                    for mat in (j for j in i.data.materials if j is not None):
                         toggle.track(mat, "use_vertex_color_paint", False)
                     toggle.track(i, "hide_render", False)
                 elif isinstance(i.data, bpy.types.Mesh) and not self._has_valid_material(i):
diff --git a/korman/render.py b/korman/render.py
index d478ef4..393b9eb 100644
--- a/korman/render.py
+++ b/korman/render.py
@@ -33,6 +33,7 @@ properties_material.MATERIAL_PT_specular.COMPAT_ENGINES.add("PLASMA_GAME")
 properties_material.MATERIAL_PT_options.COMPAT_ENGINES.add("PLASMA_GAME")
 properties_material.MATERIAL_PT_preview.COMPAT_ENGINES.add("PLASMA_GAME")
 properties_material.MATERIAL_PT_transp.COMPAT_ENGINES.add("PLASMA_GAME")
+properties_material.MATERIAL_PT_shadow.COMPAT_ENGINES.add("PLASMA_GAME")
 del properties_material
 
 from bl_ui import properties_data_mesh
diff --git a/korman/ui/modifiers/render.py b/korman/ui/modifiers/render.py
index 34063c2..be79b78 100644
--- a/korman/ui/modifiers/render.py
+++ b/korman/ui/modifiers/render.py
@@ -87,17 +87,21 @@ def lightmap(modifier, layout, context):
     layout.prop(modifier, "lights")
     layout.prop_search(modifier, "uv_map", context.active_object.data, "uv_textures")
 
-    operator = layout.operator("object.plasma_lightmap_preview", "Preview Lightmap", icon="RENDER_STILL")
-
-    # Kind of clever stuff to show the user a preview...
-    # We can't show images, so we make a hidden ImageTexture called LIGHTMAPGEN_PREVIEW. We check
-    # the backing image name to see if it's for this lightmap. If so, you have a preview. If not,
-    # well... It was nice knowing you!
-    tex = bpy.data.textures.get("LIGHTMAPGEN_PREVIEW")
-    if tex is not None and tex.image is not None:
-        im_name = "{}_LIGHTMAPGEN.png".format(context.active_object.name)
-        if tex.image.name == im_name:
-            layout.template_preview(tex, show_buttons=False)
+    # Lightmaps can only be applied to objects with opaque materials.
+    if any((i.use_transparency for i in modifier.id_data.data.materials if i is not None)):
+        layout.label("Transparent objects cannot be lightmapped.", icon="ERROR")
+    else:
+        operator = layout.operator("object.plasma_lightmap_preview", "Preview Lightmap", icon="RENDER_STILL")
+
+        # Kind of clever stuff to show the user a preview...
+        # We can't show images, so we make a hidden ImageTexture called LIGHTMAPGEN_PREVIEW. We check
+        # the backing image name to see if it's for this lightmap. If so, you have a preview. If not,
+        # well... It was nice knowing you!
+        tex = bpy.data.textures.get("LIGHTMAPGEN_PREVIEW")
+        if tex is not None and tex.image is not None:
+            im_name = "{}_LIGHTMAPGEN.png".format(context.active_object.name)
+            if tex.image.name == im_name:
+                layout.template_preview(tex, show_buttons=False)
 
 def rtshadow(modifier, layout, context):
     split = layout.split()