diff --git a/rtiow/Cargo.lock b/rtiow/Cargo.lock
index 2366eff..b02e7f2 100644
--- a/rtiow/Cargo.lock
+++ b/rtiow/Cargo.lock
@@ -223,6 +223,12 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "anyhow"
+version = "1.0.68"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2cb2f989d18dd141ab8ae82f64d1a8cdd37e0840f73a406896cf5e99502fab61"
+
 [[package]]
 name = "askama"
 version = "0.7.2"
@@ -1670,7 +1676,7 @@ dependencies = [
  "serde",
  "serde_derive",
  "stderrlog",
- "structopt",
+ "structopt 0.2.18",
 ]
 
 [[package]]
@@ -1685,7 +1691,7 @@ dependencies = [
  "serde",
  "serde_derive",
  "stderrlog",
- "structopt",
+ "structopt 0.2.18",
  "warp",
 ]
 
@@ -1932,6 +1938,30 @@ version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eb9f9e6e233e5c4a35559a617bf40a4ec447db2e84c20b55a6f83167b7e57872"
 
+[[package]]
+name = "proc-macro-error"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2 1.0.49",
+ "quote 1.0.21",
+ "syn 1.0.107",
+ "version_check 0.9.4",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+dependencies = [
+ "proc-macro2 1.0.49",
+ "quote 1.0.21",
+ "version_check 0.9.4",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "0.4.30"
@@ -2288,7 +2318,8 @@ dependencies = [
  "serde",
  "serde_derive",
  "serde_json",
- "structopt",
+ "stl",
+ "structopt 0.2.18",
  "vec3",
 ]
 
@@ -2550,6 +2581,18 @@ dependencies = [
  "thread_local",
 ]
 
+[[package]]
+name = "stl"
+version = "0.1.0"
+dependencies = [
+ "ansi_term",
+ "anyhow",
+ "byteorder",
+ "structopt 0.3.26",
+ "thiserror",
+ "vec3",
+]
+
 [[package]]
 name = "string"
 version = "0.2.1"
@@ -2572,7 +2615,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "16c2cdbf9cc375f15d1b4141bc48aeef444806655cd0e904207edc8d68d86ed7"
 dependencies = [
  "clap",
- "structopt-derive",
+ "structopt-derive 0.2.18",
+]
+
+[[package]]
+name = "structopt"
+version = "0.3.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c6b5c64445ba8094a6ab0c3cd2ad323e07171012d9c98b0b15651daf1787a10"
+dependencies = [
+ "clap",
+ "lazy_static 1.4.0",
+ "structopt-derive 0.4.18",
 ]
 
 [[package]]
@@ -2587,6 +2641,19 @@ dependencies = [
  "syn 0.15.44",
 ]
 
+[[package]]
+name = "structopt-derive"
+version = "0.4.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dcb5ae327f9cc13b68763b5749770cb9e048a99bd9dfdfa58d0cf05d5f64afe0"
+dependencies = [
+ "heck",
+ "proc-macro-error",
+ "proc-macro2 1.0.49",
+ "quote 1.0.21",
+ "syn 1.0.107",
+]
+
 [[package]]
 name = "subtle"
 version = "2.4.1"
@@ -2671,6 +2738,26 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "thiserror"
+version = "1.0.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a9cd18aa97d5c45c6603caea1da6628790b37f7a34b6ca89522331c5180fed0"
+dependencies = [
+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
+version = "1.0.38"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fb327af4685e4d03fa8cbcf1716380da910eeb2bb8be417e7f9fd3fb164f36f"
+dependencies = [
+ "proc-macro2 1.0.49",
+ "quote 1.0.21",
+ "syn 1.0.107",
+]
+
 [[package]]
 name = "thread_local"
 version = "0.3.4"
@@ -2964,7 +3051,7 @@ dependencies = [
  "log 0.4.17",
  "renderer",
  "stderrlog",
- "structopt",
+ "structopt 0.2.18",
 ]
 
 [[package]]
diff --git a/rtiow/renderer/Cargo.toml b/rtiow/renderer/Cargo.toml
index 384d713..2cb1772 100644
--- a/rtiow/renderer/Cargo.toml
+++ b/rtiow/renderer/Cargo.toml
@@ -23,6 +23,8 @@ serde_derive = "1.0.79"
 serde_json = "1.0.41"
 structopt = "0.2.10"
 vec3 = {path = "../vec3"}
+stl = {path = "../../../stl"}
+#stl = {git = "https://git-private.z.xinu.tv/wathiede/stl"}
 
 [dev-dependencies]
 criterion = "0.2"
diff --git a/rtiow/renderer/src/aabb.rs b/rtiow/renderer/src/aabb.rs
index a1454dc..95bf2a1 100644
--- a/rtiow/renderer/src/aabb.rs
+++ b/rtiow/renderer/src/aabb.rs
@@ -2,7 +2,7 @@ use std::fmt;
 
 use crate::{ray::Ray, vec3::Vec3};
 
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, PartialEq)]
 pub struct AABB {
     bounds: [Vec3; 2],
 }
diff --git a/rtiow/renderer/src/lib.rs b/rtiow/renderer/src/lib.rs
index b6513f0..622ef2c 100644
--- a/rtiow/renderer/src/lib.rs
+++ b/rtiow/renderer/src/lib.rs
@@ -21,4 +21,5 @@ pub mod scenes;
 pub mod sphere;
 pub mod texture;
 pub mod translate;
+pub mod triangles;
 pub mod vec3;
diff --git a/rtiow/renderer/src/triangles.rs b/rtiow/renderer/src/triangles.rs
new file mode 100644
index 0000000..acc78af
--- /dev/null
+++ b/rtiow/renderer/src/triangles.rs
@@ -0,0 +1,76 @@
+use stl::STL;
+
+use crate::{
+    aabb::AABB,
+    hitable::{Hit, HitRecord},
+    material::Material,
+    ray::Ray,
+    vec3::{dot, Vec3},
+};
+
+#[derive(Debug)]
+pub struct Triangle {
+    pub normal: Vec3,
+    pub verts: [Vec3; 3],
+}
+
+#[derive(Debug)]
+pub struct Triangles<M>
+where
+    M: Material,
+{
+    triangles: Vec<Triangle>,
+    bbox: Option<AABB>,
+    material: M,
+}
+
+impl<M> Triangles<M>
+where
+    M: Material,
+{
+    pub fn new<V>(stl: &STL, material: M) -> Triangles<M> {
+        let triangles: Vec<_> = stl
+            .triangles
+            .iter()
+            .map(|t| Triangle {
+                normal: t.normal,
+                verts: t.verts,
+            })
+            .collect();
+        let (min, max) = triangles.iter().fold(
+            (Vec3::from(f32::MAX), Vec3::from(f32::MIN)),
+            |(min, max), t| {
+                let t_min_x = t.verts[0].x.min(t.verts[1].x.min(t.verts[2].x));
+                let t_min_y = t.verts[0].y.min(t.verts[1].y.min(t.verts[2].y));
+                let t_min_z = t.verts[0].z.min(t.verts[1].z.min(t.verts[2].z));
+                let t_max_x = t.verts[0].x.max(t.verts[1].x.max(t.verts[2].x));
+                let t_max_y = t.verts[0].y.max(t.verts[1].y.max(t.verts[2].y));
+                let t_max_z = t.verts[0].z.max(t.verts[1].z.max(t.verts[2].z));
+
+                (
+                    Vec3::from([min.x.min(t_min_x), min.y.min(t_min_y), min.z.min(t_min_z)]),
+                    Vec3::from([max.x.max(t_max_x), max.y.max(t_max_y), max.z.max(t_max_z)]),
+                )
+            },
+        );
+        let bbox = Some(AABB::new(min, max));
+        Triangles {
+            triangles,
+            bbox,
+            material,
+        }
+    }
+}
+
+impl<M> Hit for Triangles<M>
+where
+    M: Material,
+{
+    fn hit(&self, r: Ray, t_min: f32, t_max: f32) -> Option<HitRecord> {
+        None
+    }
+
+    fn bounding_box(&self, _t_min: f32, _t_max: f32) -> Option<AABB> {
+        self.bbox
+    }
+}