diff --git a/src/bin/minedmap/region_processor.rs b/src/bin/minedmap/region_processor.rs
index 640467c..e410013 100644
--- a/src/bin/minedmap/region_processor.rs
+++ b/src/bin/minedmap/region_processor.rs
@@ -6,6 +6,17 @@ use minedmap::{io::storage, resource, types::*, world};
 
 use super::common::*;
 
+/// Parses a filename in the format r.X.Z.mca into the contained X and Z values
+fn parse_region_filename(path: &Path) -> Option<RegionCoords> {
+	let file_name = path.file_name()?.to_str()?;
+	let parts: Vec<_> = file_name.split('.').collect();
+	let &["r", x, z, "mca"] = parts.as_slice() else {
+			return None;
+		};
+
+	Some((x.parse().ok()?, z.parse().ok()?))
+}
+
 /// Type with methods for processing the regions of a Minecraft save directory
 pub struct RegionProcessor<'a> {
 	block_types: resource::BlockTypes,
@@ -22,17 +33,6 @@ impl<'a> RegionProcessor<'a> {
 		}
 	}
 
-	/// Parses a filename in the format r.X.Z.mca into the contained X and Z values
-	fn parse_region_filename(path: &Path) -> Option<RegionCoords> {
-		let file_name = path.file_name()?.to_str()?;
-		let parts: Vec<_> = file_name.split('.').collect();
-		let &["r", x, z, "mca"] = parts.as_slice() else {
-			return None;
-		};
-
-		Some((x.parse().ok()?, z.parse().ok()?))
-	}
-
 	/// Processes a single chunk
 	fn process_chunk(
 		&self,
@@ -50,7 +50,9 @@ impl<'a> RegionProcessor<'a> {
 		world::layer::top_layer(&chunk)
 	}
 
-	fn chunk_lightmap(block_light: Box<world::layer::BlockLightArray>) -> image::GrayAlphaImage {
+	fn render_chunk_lightmap(
+		block_light: Box<world::layer::BlockLightArray>,
+	) -> image::GrayAlphaImage {
 		const N: u32 = BLOCKS_PER_CHUNK as u32;
 
 		image::GrayAlphaImage::from_fn(N, N, |x, z| {
@@ -116,7 +118,7 @@ impl<'a> RegionProcessor<'a> {
 				};
 				processed_region[chunk_coords] = Some(processed_chunk);
 
-				let chunk_lightmap = Self::chunk_lightmap(block_light);
+				let chunk_lightmap = Self::render_chunk_lightmap(block_light);
 				overlay_chunk(&mut lightmap, &chunk_lightmap, chunk_coords);
 
 				Ok(())
@@ -163,7 +165,7 @@ impl<'a> RegionProcessor<'a> {
 				.unwrap_or_default()
 		}) {
 			let path = entry.path();
-			let Some(coords) = Self::parse_region_filename(&path) else {
+			let Some(coords) = parse_region_filename(&path) else {
 				continue;
 			};
 
diff --git a/src/bin/minedmap/tile_renderer.rs b/src/bin/minedmap/tile_renderer.rs
index 4a7b511..fcd3e85 100644
--- a/src/bin/minedmap/tile_renderer.rs
+++ b/src/bin/minedmap/tile_renderer.rs
@@ -6,6 +6,19 @@ use minedmap::{io::storage, resource::Biome, types::*, world};
 
 use super::common::*;
 
+fn block_color(block: &world::layer::BlockInfo, _biome: &Biome) -> [u8; 4] {
+	let h = block
+		.depth
+		.map(|depth| 0.5 + 0.005 * depth.0 as f32)
+		.unwrap_or_default();
+	let c = block
+		.block_type
+		.color
+		.0
+		.map(|v| (f32::from(v) * h).clamp(0.0, 255.0) as u8);
+	[c[0], c[1], c[2], 255]
+}
+
 pub struct TileRenderer<'a> {
 	config: &'a Config,
 }
@@ -20,19 +33,6 @@ impl<'a> TileRenderer<'a> {
 		storage::read(&processed_path).context("Failed to load processed region data")
 	}
 
-	fn block_color(block: &world::layer::BlockInfo, _biome: &Biome) -> [u8; 4] {
-		let h = block
-			.depth
-			.map(|depth| 0.5 + 0.005 * depth.0 as f32)
-			.unwrap_or_default();
-		let c = block
-			.block_type
-			.color
-			.0
-			.map(|v| (f32::from(v) * h).clamp(0.0, 255.0) as u8);
-		[c[0], c[1], c[2], 255]
-	}
-
 	fn render_chunk(
 		image: &mut image::RgbaImage,
 		coords: ChunkCoords,
@@ -47,7 +47,7 @@ impl<'a> TileRenderer<'a> {
 				z: BlockZ(z as u8),
 			};
 			image::Rgba(match (&blocks[coords], &biomes[coords]) {
-				(Some(block), Some(biome)) => Self::block_color(block, biome),
+				(Some(block), Some(biome)) => block_color(block, biome),
 				_ => [0, 0, 0, 0],
 			})
 		});