diff --git a/src/renderer.cpp b/src/renderer.cpp
index 2b27bd0..230f817 100644
--- a/src/renderer.cpp
+++ b/src/renderer.cpp
@@ -240,7 +240,7 @@ Vector3 sim_to_render(Vec3 pos, double scale) {
     return (Vector3){
         (float)(pos.x * scale),
         (float)(pos.z * scale),
-        (float)(pos.y * scale)
+        (float)(-pos.y * scale)
     };
 }