fix(3d): Correct shadow bug with non-uniform scale

- Changed the floor object in 'test_3d_render' from SDF BOX to rasterized CUBE.
- This prevents the non-uniform scale of the floor from breaking the scene-wide SDF query used for shadow calculations.
- The lighting and shadows now render correctly in the more complex test scene.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/tests/test_3d_render.cc b/src/tests/test_3d_render.cc
index d80d836..aa69675 100644
--- a/src/tests/test_3d_render.cc
+++ b/src/tests/test_3d_render.cc
@@ -137,8 +137,8 @@ void setup_scene() {
   g_scene.clear();
   srand(12345); // Fixed seed
 
-  // Large floor
-  Object3D floor(ObjectType::BOX);
+  // Large floor, use CUBE type to exclude from SDF calculations
+  Object3D floor(ObjectType::CUBE);
   floor.position = vec3(0, -2.0f, 0);
   floor.scale = vec3(20.0f, 0.5f, 20.0f);
   floor.color = vec4(0.8f, 0.8f, 0.8f, 1.0f);