Factorio Forums

I have a blueprint containing roboports and substations. It is set to snap to grid (absolute). The issue is observed when trying to cover parts of the map with this blueprint in the following way:
- go into remote view
- select blueprint
- move cursor to desired location
- hold shift (to activate force building)
- hold left mouse button (to place blueprint)
- hold one of w/a/s/d to move map view

Expected behavior: blueprint gets placed every 36 tiles (36 being the value for snap to grid in both directions)
Observed behavior: blueprint mostly gets placed every 36 tiles, but sometimes a placement is skipped. In the attached screen capture, this happens twice.

I observed this on a base where the UPS value was fairly low (below 30), but don't know how much of a role this plays.

Blueprint exhibiting this behavior:
Copy blueprint

I suspect the lag combined with how drag building works means it simply didn't process the build action for the position shown. I don't believe we have "gap filling" logic implemented for drag building blueprints meaning if you move too fast the positions between the last build action and the current won't be filled in - it will just build where the cursor currently is - snapped to the grid.