Simulation distance – Minecraft Wiki

Simulation distance is a world-creation setting in Bedrock Edition that controls mob spawning and despawning, and tick updates. In Java Edition, simulation distance is a video setting related to render distance, to restrict tick update distance. The simulation distance control appears in the settings page when creating a new world. The values that can be set range from 4 to 12 in increments of 2 (even numbers only). Simulation distance determines the maximum chunk distance in which entities get

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Minecraft Instance Configuration Options

Simulation distance – Minecraft Wiki

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Render Distance, Minecraft Bedrock Wiki

Mob Spawning Simulation Distance Render Distance