Inspect interior gaps in product cutouts so handles, straps and open spaces remain accurate after background removal.
Look inside the silhouette
Background removal is not only about the outer boundary. A mug handle, handbag strap, chair back or bicycle frame contains spaces that should usually reveal the new background. A model can retain the object correctly while leaving a small patch of the old scene trapped inside it.
Check each opening deliberately
After processing, compare every meaningful gap with the original. Use a custom preview color that differs strongly from the source background. The color should show through actual empty spaces. If a handle opening stays white while the surrounding background turns blue, it may contain retained source pixels rather than transparency.
A dark mug photographed against a white wall is a useful example: the outside may separate cleanly, but the bright opening is still part of the background. Conversely, a printed white logo on the mug should remain opaque. Treat these as different regions even if they share a color.
Protect the product's shape
Do not remove a real crossbar or strap merely because it crosses an open area. Background removal should preserve what the item actually contains. ToolNivo does not offer a manual erase brush, so unresolved holes need a different source or a follow-up editor. Recheck the exported PNG on the destination background before using it in a listing where the item's construction matters.