Why does Construct 3 Tilemap collision not match the visual tiles?

Per-tile collision polygon is set in the tilemap editor, not inherited from the sprite. Open the tilemap, select a tile, edit its Collision Polygon. Apply to similar tiles.

Right-click tile → Apply collision polygon to similar tiles. Or set on tile 0 and copy. Saves redoing per-cell.

Custom triangular polygons per slope angle. Use Solid behavior with the polygon for accurate slope handling.

Fix: Construct 3 Tilemap Collision Doesn't Match Visual

Quick answer: Tilemap editor → per-tile Collision Polygon. Right-click apply to similar tiles for bulk.

Player slides over visible spike tile because the polygon collision is the full square, not the spike shape. Per-tile polygon required.

The Fix

Tilemap object → Edit tilemap:
  Select tile (e.g. spike)
  Tab: Collision Polygon
  Adjust polygon points to match the spike outline
  Right-click → Apply collision polygon to similar tiles

Per-tile collision polygons let you have spikes, slopes, and platforms with accurate shapes.

Verifying

Walk through tile area: collision matches visible shape. Without polygon: full-cell collision.

“Polygon per tile. Match visuals.”

Related Issues

For Physics resize, see physics resize. For loader layout, see loader.

Per-tile polygon. Match.