Fix GPU memory issues

src/display3d.rs

@@ -19,6 +19,12 @@ impl Plugin for Display3dPlugin {
             color: Color::WHITE,
             brightness: 100.0,
         })
+        .insert_resource(PointLightShadowMap {
+            size: 512
+        })
+        .insert_resource(DirectionalLightShadowMap {
+            size: 512
+        })
         .add_systems(
             OnExit(GameState::Loading),
             (