A strong gallery wall layout generator preview still needs a short human checklist before you mark holes.
Confirm the cluster sits at a comfortable height above furniture, usually with the center of the group near eye level when standing. Confirm total width relates to the sofa or console below. Confirm gaps look even across the set. Confirm no frame lands on a switch, vent, or TV cable path. Confirm frame finishes in your notes match what you will buy.
If one region looks soft or frames drift off the wall plane, re-upload a straighter photo and regenerate with one setting changed. Do not treat a warped phone shot as the final gallery wall planner reference.