diff --git a/src/mesh.rs b/src/mesh.rs
index 414d4b2..f76145d 100644
--- a/src/mesh.rs
+++ b/src/mesh.rs
@@ -7,7 +7,7 @@ pub struct Mesh {
 	pub faces: Vec<[usize; 3]>,
 }
 
-pub fn generate(shape: &crate::ShapeArgs) -> Mesh {
+pub fn shell(shape: &crate::ShapeArgs) -> Mesh {
 	let mut vertices = Vec::<Vec3>::new();
 	let mut faces = Vec::<[usize; 3]>::new();
 
@@ -24,10 +24,6 @@ pub fn generate(shape: &crate::ShapeArgs) -> Mesh {
 	let incline = height / (top_y - bottom_y);
 	let elevation = -height / 2. - incline * bottom_y;
 
-	let base = vertices.len();
-	for side in 0..(sides - 2) {
-		faces.push([base + sides - 1, base + side + 1, base + side]);
-	}
 	for layer in 0..=layers {
 		let angle = (PI / sides as f32) * (layer as f32 - base_layer as f32);
 		let x = radius;
@@ -42,17 +38,27 @@ pub fn generate(shape: &crate::ShapeArgs) -> Mesh {
 		}
 	}
 	for layer in 0..layers {
-		let base = base + sides * layer;
+		let base = sides * layer;
 		for side in 0..sides {
 			let index = |layer, offset| base + sides * layer + (side + offset) % sides;
 			faces.push([index(0, 0), index(0, 1), index(1, 0)]);
 			faces.push([index(0, 1), index(1, 1), index(1, 0)]);
 		}
 	}
-	let base = vertices.len() - sides;
-	for side in 0..(sides - 2) {
-		faces.push([base + sides - 1, base + side, base + side + 1]);
-	}
 
 	Mesh { vertices, faces }
 }
+
+pub fn solid(shape: &crate::ShapeArgs) -> Mesh {
+	let mut mesh = shell(shape);
+	let sides = shape.sides as usize;
+	for side in 0..(sides - 2) {
+		mesh.faces.push([sides - 1, side + 1, side]);
+	}
+	let base = mesh.vertices.len() - sides;
+	for side in 0..(sides - 2) {
+		mesh.faces
+			.push([base + sides - 1, base + side, base + side + 1]);
+	}
+	mesh
+}