Fixing more macos things

src/Engine/Material/MaterialInstance.cpp

@@ -50,6 +50,8 @@ MaterialInstance::~MaterialInstance()
 
 void MaterialInstance::updateDescriptor()
 {
+    if(!dirty)
+        return;
     Gfx::PDescriptorLayout layout = baseMaterial->getMaterial()->getDescriptorLayout();
     descriptor = layout->allocateDescriptorSet();
     for (auto& param : parameters)
@@ -85,7 +87,6 @@ void MaterialInstance::setBaseMaterial(PMaterialAsset asset)
         );
     }
     baseMaterial = asset;
-    updateDescriptor();
 }
 
 void MaterialInstance::save(ArchiveBuffer& buffer) const

src/Engine/Material/MaterialInstance.h

@@ -35,6 +35,7 @@ private:
     Gfx::PDescriptorSet descriptor;
     PMaterialAsset baseMaterial;
     uint64 id;
+    bool dirty = true;
 };
 DEFINE_REF(MaterialInstance)
 } // namespace Seele