diff --git a/Cargo.lock b/Cargo.lock
index 28b11ce..77a7aff 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -29,14 +29,14 @@ dependencies = [
  "owo-colors",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
 name = "bytemuck"
-version = "1.14.0"
+version = "1.14.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "374d28ec25809ee0e23827c2ab573d729e293f281dfe393500e7ad618baa61c6"
+checksum = "ea31d69bda4949c1c1562c1e6f042a1caefac98cdc8a298260a2ff41c1e2d42b"
 
 [[package]]
 name = "either"
@@ -50,6 +50,16 @@ version = "0.25.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "151665d9be52f9bb40fc7966565d39666f2d1e69233571b71b87791c7e0528b3"
 
+[[package]]
+name = "id"
+version = "0.1.0"
+source = "git+https://git.itzana.me/Quaternions/id?rev=1f710976cc786c8853dab73d6e1cee53158deeb0#1f710976cc786c8853dab73d6e1cee53158deeb0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.48",
+]
+
 [[package]]
 name = "owo-colors"
 version = "3.5.0"
@@ -58,9 +68,9 @@ checksum = "c1b04fb49957986fdce4d6ee7a65027d55d4b6d2265e5848bbb507b58ccfdb6f"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.76"
+version = "1.0.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95fc56cda0b5c3325f5fbbd7ff9fda9e02bb00bb3dac51252d2f1bfa1cb8cc8c"
+checksum = "e2422ad645d89c99f8f3e6b88a9fdeca7fabeac836b1002371c4367c8f984aae"
 dependencies = [
  "unicode-ident",
 ]
@@ -87,6 +97,7 @@ name = "strafesnet_snf"
 version = "0.1.0"
 dependencies = [
  "binrw",
+ "id",
  "strafesnet_common",
 ]
 
@@ -101,6 +112,17 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "syn"
+version = "2.0.48"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f3531638e407dfc0814761abb7c00a5b54992b849452a0646b7f65c9f770f3f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.12"
diff --git a/Cargo.toml b/Cargo.toml
index ca43200..122fe09 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,4 +7,5 @@ edition = "2021"
 
 [dependencies]
 binrw = "0.13.3"
+id = { git = "https://git.itzana.me/Quaternions/id", rev = "1f710976cc786c8853dab73d6e1cee53158deeb0" }
 strafesnet_common = { git = "https://git.itzana.me/StrafesNET/common", rev = "5ee826d9487b5e2bea4b3cf99a68ce9a95d72f72" }
diff --git a/src/bot.rs b/src/bot.rs
index 17770bd..a22f923 100644
--- a/src/bot.rs
+++ b/src/bot.rs
@@ -3,7 +3,7 @@ use binrw::{BinReaderExt, binrw};
 pub enum Error{
 	InvalidHeader,
 	InvalidSegment(binrw::Error),
-	InvalidSegmentId(u64),
+	InvalidSegmentId(SegmentId),
 	File(crate::file::Error),
 }
 
@@ -64,7 +64,8 @@ mod simulation{
 
 #[binrw]
 #[brw(little)]
-struct SegmentId(u64);
+#[derive(Clone,Copy,id::Id)]
+pub struct SegmentId(u32);
 
 #[binrw]
 #[brw(little)]
@@ -86,9 +87,9 @@ impl<R:BinReaderExt> StreamableBot<R>{
 		Err(Error::InvalidHeader)
 	}
 	pub fn load_segment(&mut self,segment_id:SegmentId)->Result<Segment,Error>{
-		let block_id=*self.segment_id_to_block_id.get(segment_id.0 as usize).ok_or(Error::InvalidSegmentId(segment_id.0))?;
-		let mut block=self.file.take_block(block_id).map_err(|e|Error::File(e))?;
-		let segment=block.read_le().map_err(|e|Error::InvalidSegment(e))?;
+		let block_id=*self.segment_id_to_block_id.get(segment_id.get() as usize).ok_or(Error::InvalidSegmentId(segment_id))?;
+		let mut block=self.file.take_block(block_id).map_err(Error::File)?;
+		let segment=block.read_le().map_err(Error::InvalidSegment)?;
 		Ok(segment)
 	}
 }
\ No newline at end of file
diff --git a/src/file.rs b/src/file.rs
index d9e6979..1a9e9dd 100644
--- a/src/file.rs
+++ b/src/file.rs
@@ -5,7 +5,7 @@ use binrw::{binrw, BinReaderExt, io::TakeSeekExt};
 pub enum Error{
 	InvalidHeader(binrw::Error),
 	UnexpectedEOF,
-	InvalidBlockId(u64),
+	InvalidBlockId(BlockId),
 	Seek(std::io::Error),
 }
 
@@ -58,14 +58,16 @@ struct Header{
 	priming:u64,
 	/// uuid for this file
 	resource:u128,
-	#[bw(try_calc(u64::try_from(block_location.len()-1)))]
-	block_count:u64,
+	#[bw(try_calc(u32::try_from(block_location.len()-1)))]
+	block_count:u32,
 	#[br(count=block_count+1)]
 	block_location:Vec<u64>,
 }
 
-#[derive(Clone,Copy,Hash,Eq,PartialEq)]
-pub struct BlockId(u64);
+#[binrw]
+#[brw(little)]
+#[derive(Clone,Copy,Hash,id::Id,Eq,PartialEq)]
+pub struct BlockId(u32);
 
 pub(crate) struct File<R:BinReaderExt>{
 	header:Header,
@@ -76,17 +78,17 @@ pub(crate) struct File<R:BinReaderExt>{
 impl<R:BinReaderExt> File<R>{
 	pub(crate) fn new(mut input:R)->Result<File<R>,Error>{
 		Ok(File{
-			header:input.read_le().map_err(|e|Error::InvalidHeader(e))?,
+			header:input.read_le().map_err(Error::InvalidHeader)?,
 			data:input,
 		})
 	}
 	pub(crate) fn take_block(&mut self,block_id:BlockId)->Result<binrw::io::TakeSeek<&mut R>,Error>{
-		if self.header.block_location.len() as u64<=block_id.0{
-			return Err(Error::InvalidBlockId(block_id.0))
+		if self.header.block_location.len() as u32<=block_id.get(){
+			return Err(Error::InvalidBlockId(block_id))
 		}
-		let block_start=self.header.block_location[block_id.0 as usize];
-		let block_end=self.header.block_location[block_id.0 as usize+1];
-		self.data.seek(std::io::SeekFrom::Start(block_start)).map_err(|e|Error::Seek(e))?;
+		let block_start=self.header.block_location[block_id.get() as usize];
+		let block_end=self.header.block_location[block_id.get() as usize+1];
+		self.data.seek(std::io::SeekFrom::Start(block_start)).map_err(Error::Seek)?;
 		Ok((&mut self.data).take_seek(block_end-block_start))
 	}
 	pub(crate) fn fourcc(&self)->FourCC{
diff --git a/src/lib.rs b/src/lib.rs
index d17883a..bac2c04 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -20,31 +20,31 @@ pub enum SNF<R:BinReaderExt>{
 }
 
 pub fn read_snf<R:BinReaderExt>(input:R)->Result<SNF<R>,Error>{
-	let file=file::File::new(input).map_err(|e|Error::Header(e))?;
+	let file=file::File::new(input).map_err(Error::Header)?;
 	Ok(match file.fourcc(){
-		file::FourCC::Map=>SNF::Map(map::StreamableMap::new(file).map_err(|e|Error::Map(e))?),
-		file::FourCC::Bot=>SNF::Bot(bot::StreamableBot::new(file).map_err(|e|Error::Bot(e))?),
-		file::FourCC::Demo=>SNF::Demo(demo::StreamableDemo::new(file).map_err(|e|Error::Demo(e))?),
+		file::FourCC::Map=>SNF::Map(map::StreamableMap::new(file).map_err(Error::Map)?),
+		file::FourCC::Bot=>SNF::Bot(bot::StreamableBot::new(file).map_err(Error::Bot)?),
+		file::FourCC::Demo=>SNF::Demo(demo::StreamableDemo::new(file).map_err(Error::Demo)?),
 	})
 }
 pub fn read_map<R:BinReaderExt>(input:R)->Result<map::StreamableMap<R>,Error>{
-	let file=file::File::new(input).map_err(|e|Error::Header(e))?;
+	let file=file::File::new(input).map_err(Error::Header)?;
 	match file.fourcc(){
-		file::FourCC::Map=>Ok(map::StreamableMap::new(file).map_err(|e|Error::Map(e))?),
+		file::FourCC::Map=>Ok(map::StreamableMap::new(file).map_err(Error::Map)?),
 		_=>Err(Error::UnexpectedFourCC)
 	}
 }
 pub fn read_bot<R:BinReaderExt>(input:R)->Result<bot::StreamableBot<R>,Error>{
-	let file=file::File::new(input).map_err(|e|Error::Header(e))?;
+	let file=file::File::new(input).map_err(Error::Header)?;
 	match file.fourcc(){
-		file::FourCC::Bot=>Ok(bot::StreamableBot::new(file).map_err(|e|Error::Bot(e))?),
+		file::FourCC::Bot=>Ok(bot::StreamableBot::new(file).map_err(Error::Bot)?),
 		_=>Err(Error::UnexpectedFourCC)
 	}
 }
 pub fn read_demo<R:BinReaderExt>(input:R)->Result<demo::StreamableDemo<R>,Error>{
-	let file=file::File::new(input).map_err(|e|Error::Header(e))?;
+	let file=file::File::new(input).map_err(Error::Header)?;
 	match file.fourcc(){
-		file::FourCC::Demo=>Ok(demo::StreamableDemo::new(file).map_err(|e|Error::Demo(e))?),
+		file::FourCC::Demo=>Ok(demo::StreamableDemo::new(file).map_err(Error::Demo)?),
 		_=>Err(Error::UnexpectedFourCC)
 	}
 }
diff --git a/src/map.rs b/src/map.rs
index 666f46e..45c104e 100644
--- a/src/map.rs
+++ b/src/map.rs
@@ -4,7 +4,7 @@ use binrw::{BinReaderExt, binrw};
 
 pub enum Error{
 	InvalidHeader,
-	InvalidNodeId(u64),
+	InvalidBvhNodeId(BvhNodeId),
 	InvalidRegion(binrw::Error),
 	File(crate::file::Error),
 }
@@ -77,9 +77,14 @@ mod image{
 
 struct ModelUuid(u128);
 struct ImageUuid(u128);
-pub struct BvhNodeId(u64);
+
+#[binrw]
+#[brw(little)]
+#[derive(Clone,Copy,id::Id)]
+pub struct BvhNodeId(u32);
 struct BvhNode{
-	//
+	//aabb
+	//child
 }
 #[binrw]
 #[brw(little)]
@@ -106,9 +111,9 @@ impl<R:BinReaderExt> StreamableMap<R>{
 		//parse the models and determine what resources need to be loaded
 		//load resources into self.resources
 		//return Region
-		let block_id=*self.node_id_to_block_id.get(node_id.0 as usize).ok_or(Error::InvalidNodeId(node_id.0))?;
-		let mut block=self.file.take_block(block_id).map_err(|e|Error::File(e))?;
-		let region:Region=block.read_le().map_err(|e|Error::InvalidRegion(e))?;
+		let block_id=*self.node_id_to_block_id.get(node_id.get() as usize).ok_or(Error::InvalidBvhNodeId(node_id))?;
+		let mut block=self.file.take_block(block_id).map_err(Error::File)?;
+		let region:Region=block.read_le().map_err(Error::InvalidRegion)?;
 		Ok(region.models)
 	}
 	// pub fn load_resource(&mut self,resource_id:ResourceId)->Resource{