diff --git a/src/main.go b/src/main.go
index 1868e3b..e9e0ad8 100644
--- a/src/main.go
+++ b/src/main.go
@@ -13,8 +13,8 @@ import (
 	rl "github.com/gen2brain/raylib-go/raylib"
 )
 
-const WIDTH = 100
-const HEIGHT = 100
+const WIDTH = 200
+const HEIGHT = 200
 const TEXTURE_SCALE = 4
 
 const MAX_DIST = 500.0
diff --git a/src/material.go b/src/material.go
index d9075ee..e9d3b70 100644
--- a/src/material.go
+++ b/src/material.go
@@ -1,6 +1,8 @@
 package main
 
-import "math"
+import (
+	"math"
+)
 
 type Color interface {
 	GetColor(Vector3) Vector3
diff --git a/src/ray_marching.go b/src/ray_marching.go
index d7b806f..911ac74 100644
--- a/src/ray_marching.go
+++ b/src/ray_marching.go
@@ -39,7 +39,7 @@ func shadow(point Vector3) float64 {
 		}
 		res = min(res, SOFT_SHADOW_COEFF*dist/dist_total)
 		dist_total += dist
-		p = p.Add(direction.Scale(dist))
+		p.Radd(direction.Scale(dist))
 	}
 	return res
 }
@@ -55,7 +55,7 @@ func rayMarch(origin Vector3, direction Vector3) (bool, Vector3) {
 		if dist > MAX_DIST {
 			break
 		}
-		p = p.Add(direction.Scale(dist))
+		p.Radd(direction.Scale(dist))
 	}
 	return false, GREY
 }
diff --git a/src/sdf.go b/src/sdf.go
index 64f52c0..ca576d2 100644
--- a/src/sdf.go
+++ b/src/sdf.go
@@ -73,7 +73,7 @@ type UnionSDF struct {
 func (s UnionSDF) Distance(p Vector3) (float64, *Material) {
 	d1, color1 := s.primitive1.Distance(p)
 	d2, color2 := s.primitive2.Distance(p)
-	d := math.Min(d1, d2)
+	d := min(d1, d2)
 
 	color := color1
 	if d2 < d1 {
@@ -91,7 +91,7 @@ func (s SubstractionSDF) Distance(p Vector3) (float64, *Material) {
 	d1, color1 := s.primitive1.Distance(p)
 	d2, _ := s.primitive2.Distance(p)
 
-	d := math.Max(d1, -d2)
+	d := max(d1, -d2)
 	return d, color1
 }
 
@@ -104,7 +104,7 @@ func (s IntersectionSDF) Distance(p Vector3) (float64, *Material) {
 
 	d1, mat1 := s.primitive1.Distance(p)
 	d2, mat2 := s.primitive2.Distance(p)
-	d := math.Max(d1, d2)
+	d := max(d1, d2)
 
 	var mat Material = MixedMaterial{mat1, mat2, 0.5, p}
 	return d, &mat
@@ -120,8 +120,8 @@ func (s SmoothUnionSDF) Distance(p Vector3) (float64, *Material) {
 	k := 4 * s.k
 	d1, mat1 := s.primitive1.Distance(p)
 	d2, mat2 := s.primitive2.Distance(p)
-	h := math.Max(k-math.Abs(d1-d2), 0.0)
-	d := math.Min(d1, d2) - h*h*0.25/k
+	h := max(k-math.Abs(d1-d2), 0.0)
+	d := min(d1, d2) - h*h*0.25/k
 	t := SmoothStep(d2-d1, -k, k)
 	var mat Material = MixedMaterial{mat2, mat1, t, p}
 	return d, &mat
@@ -137,8 +137,8 @@ func (s SmoothSubstractionSDF) Distance(p Vector3) (float64, *Material) {
 	k := 4 * s.k
 	d1, mat1 := s.primitive1.Distance(p)
 	d2, mat2 := s.primitive2.Distance(p)
-	h := math.Max(k-math.Abs(-d1-d2), 0.0)
-	d := math.Max(d1, -d2) + h*h*0.25/k
+	h := max(k-math.Abs(-d1-d2), 0.0)
+	d := max(d1, -d2) + h*h*0.25/k
 	t := SmoothStep(d1-d2, -k, k)
 	var mat Material = MixedMaterial{mat1, mat2, t, p}
 	return d, &mat
@@ -154,8 +154,8 @@ func (s SmoothIntersectionSDF) Distance(p Vector3) (float64, *Material) {
 	k := 4 * s.k
 	d1, mat1 := s.primitive1.Distance(p)
 	d2, mat2 := s.primitive2.Distance(p)
-	h := math.Max(k-math.Abs(d1-d2), 0.0)
-	d := math.Max(d1, d2) + h*h*0.25/k
+	h := max(k-math.Abs(d1-d2), 0.0)
+	d := max(d1, d2) + h*h*0.25/k
 	t := SmoothStep(d2-d1, -k, k)
 	var mat Material = MixedMaterial{mat1, mat2, t, p}
 	return d, &mat
diff --git a/src/vec3.go b/src/vec3.go
index 7aea4c9..3f02686 100644
--- a/src/vec3.go
+++ b/src/vec3.go
@@ -16,12 +16,18 @@ func (u Vector3) Add(v Vector3) Vector3 {
 	return Vector3{u.X + v.X, u.Y + v.Y, u.Z + v.Z}
 }
 
+func (u *Vector3) Radd(v Vector3) {
+	u.X += v.X
+	u.Y += v.Y
+	u.Z += v.Z
+}
+
 func (u Vector3) Neg() Vector3 {
 	return Vector3{-u.X, -u.Y, -u.Z}
 }
 
 func (u Vector3) Sub(v Vector3) Vector3 {
-	return u.Add(v.Neg())
+	return Vector3{u.X - v.X, u.Y - v.Y, u.Z - v.Z}
 }
 
 func (u Vector3) Scale(a float64) Vector3 {