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Import Specs

Import 3D Model Specs

Welcome! This document explains how to create and import scenes, items and building pieces into Portals.

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If your inventory item, scene, or building piece looks good in Sketchfab — it should look good in Portals!

Max texture size recommendation: 512px x 512px

For Scenes

Target triangle count

  • Ideal: Up to 100,000 triangles
  • Maximum: 450,000 triangles

For Building Parts & Inventory Items

  • Textures — Most important: Keep texture count and size as low as possible: 256x256 and 512x512 recommended. Larger textures use a lot of RAM and will consume the browser tab’s allotment quickly (100-400mb for 1024x or 2048x sized textures) — no matter how much RAM a machine has, Chrome will limit tabs to around 1-2gb of memory usage
    • Save textures as JPG rather than PNG to save on file size for faster download times
  • Triangle Counts — Try to keep to under 15,000~ triangles for best performance
  • Total GLB file size — 1-2mb or less is ideal
  • Face Orientation — If using Blender, enable Face Orientation and ensure all faces are blue — By default, Unity will only render the blue (forward-facing) faces
    • image

🔥 Pro Tips

  • A general rule of thumb is to keep total triangles for desktop computers at 1-2 million max on screen total. 500k for mobile
  • As a good reference: Ready Player Me avatars are 15k triangles, 1.5mb in total GLB file size and utilize 512x512 textures.
    • So 40 Ready Player Me avatars on screen adds up like this: 40 avatars x 15,000 triangles = 600,000 triangles — which is already starting to be on the high end, which can start to strain lower end machines

🧠 Advanced Tips

  • If you would like for your imported GLB to fade, rather than push the camera forward when it gets between the player and the camera, add &fader=true to the URL you’re importing
  • If you would like your GLBs with emissive textures to be more or less emissive when rendered in Portals, use ?emissionMultiplier=3 for increased emissions.
    • 1 = Default
    • 0 = Disables Emissions
    • 3 = Emissions Turbo
  • ?doubleSided=true enables double sided faces on imported models