Clear MeshChunks on Dimension leave.

src/world/LocalWorld.cpp

@@ -85,6 +85,7 @@ DimensionPtr LocalWorld::getActiveDimension() {
 }
 
 void LocalWorld::setActiveDimension(DimensionPtr dim) {
+    this->activeDimension->deactivate();
     this->activeDimension = dim.l();
 }
 

src/world/dim/LocalDimension.cpp

@@ -19,6 +19,20 @@
 LocalDimension::LocalDimension(SubgamePtr game, LocalWorld& world, const std::string& identifier, unsigned int ind) :
     Dimension(game, static_cast<World&>(world), identifier, ind), meshGenStream(std::make_shared<MeshGenStream>(game, *this)) {}
 
+
+/**
+ * Deactivates a dimension, cleaning up all mesh chunks.
+ * Called on the active dimension when the player leaves it.
+ */
+
+void LocalDimension::deactivate() {
+    while (!renderElems.empty()) {
+        auto chunk = renderElems.front();
+        renderRefs.erase(chunk->getPos());
+        renderElems.pop_front();
+    }
+}
+
 void LocalDimension::update(double delta) {
     finishMeshes();
 
@@ -283,4 +297,4 @@ bool LocalDimension::getAdjacentExists(glm::vec3 pos, bool updateAdjacents) {
     if (chunk == nullptr) return false;
     if (updateAdjacents) attemptMeshChunk(chunk, false, false);
     return true;
-}
+}

src/world/dim/LocalDimension.h

@@ -25,6 +25,7 @@ public:
 
     LocalDimension(SubgamePtr game, LocalWorld& world, const std::string& identifier, unsigned int ind);
 
+    void deactivate();
     void update(double delta) override;
 
     void setChunk(std::shared_ptr<Chunk> chunk) override;

subgames/zeus/mods/zeus_default/script/entity/test.lua

@@ -10,10 +10,10 @@ zepha.register_entity("zeus:default:test", {
         self.object.anims:set_anim("walk")
         self.object.anims:play()
 
-        zepha.after(function()
+--        zepha.after(function()
 --            local in_desert = self.object.dimension.identifier == 'zeus:world:endless_desert'
 --            player:set_dimension(in_desert and "zeus:world:default" or "zeus:world:endless_desert")
-        end, 2)
+--        end, 2)
     end,
     on_update = function(self, delta)
        self.object.pos = self.object.pos +