various fixes to map size calculations

game/main/src/prelude.rs

@@ -1,11 +1,16 @@
 use bevy::asset::Handle;
+use bevy::pbr::ExtendedMaterial;
 use bevy::prelude::*;
 use bevy::prelude::{Component, Image, Resource};
 use bevy::reflect::Reflect;
 
+use crate::shader_extensions::chunk_material::ChunkMaterial;
+
 #[derive(Resource)]
 pub struct ChunkAtlas {
 	pub handle: Handle<Image>,
+	pub chunk_material_handle: Handle<ExtendedMaterial<StandardMaterial, ChunkMaterial>>,
+	pub water_material: Handle<StandardMaterial>,
 	pub is_loaded: bool,
 }