Sandustry Answers
Sandustry Early Access 0.5.5Sources checked 22 Aug 2026Unofficial player-run reference
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How do Allow, Block and multi-select work on Advanced Filters?

Allow passes selected materials; Block passes everything except them. Advanced Filters support multiple selections.

Quick answer

Choose Allow when only the selected materials should pass, or Block when every material except the selected ones should pass. A Basic Filter handles one solid resource; an Advanced Filter supports multiple selected element types across solids, liquids and gases.

Steps

  1. Place an Advanced Filter on the route that needs sorting.
  2. Open its editor by pressing the overlay label, or use Edit last placed.
  3. Select every material type the rule should test.
  4. Choose Allow to pass those selections, or Block to pass everything else.

Requirements / limits

  • Basic Filters are documented for one solid resource; multi-selection belongs to Advanced Filters.
  • Advanced Filters support solids, liquids and gases, but this page claims no undocumented throughput.
  • Update #1 changed editing and clarity; Update #2 did not alter filters.

Common mistakes

  • Using Block when only the chosen resources should pass.
  • Expecting a Basic Filter to hold several selections or filter fluids.
  • Rebuilding the filter instead of pressing its overlay label to edit it.