try use 0..1 range

sdf_export.py

@@ -28,10 +28,12 @@ def mesh_to_sdf_glsl(path, resolution=32):
     print(f"  Per-dimension extents: {extents}")
     print(f"  Max extent: {max_extent}")
 
-    # Scale to fit in [-1, 1] cube while preserving aspect ratio
+    # Scale to fit in [0, 1] cube while preserving aspect ratio
     scale = 0.9 / max_extent
     mesh.vertices *= scale
-    print(f"\nAfter scaling:")
+    # Shift to [0, 1] space
+    mesh.vertices += 0.5
+    print(f"\nAfter scaling and shifting:")
     print(f"  Scale factor: {scale}")
     print(f"  Bounds: {mesh.bounds}")
     print(f"  Extents: {mesh.extents}")
@@ -103,9 +105,9 @@ float sdfData{i}[{len(chunks[i].split(','))}] = float[](
     # Add the SDF function that combines chunks
     glsl_code += f"""
 float SDF(vec3 p) {{
-    // Map from [-1,1] to [0,resolution-1]
+    // Map from [0,1] to [0,resolution-1]
     vec3 dim = vec3({resolution}.0);
-    vec3 uv = (p + 1.0) * 0.5 * (dim - 1.0);
+    vec3 uv = p * (dim - 1.0);
     
     // Add a small offset to avoid boundary issues
     uv = clamp(uv, vec3(0.0), dim - 1.0);