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  • Joined Nov 7, 2026

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flysimdev/README.md

👋 Hi, welcome aboard

I build free, open-source tools that make flight simulation look and feel more like the real thing. My main project right now is OrthoStreamXP: photo scenery for X-Plane 12, streamed while you fly.

  • 🛫 Currently working on OrthoStreamXP (beta)
  • 🗺️ Interested in aerial imagery, texture streaming, terrain and anything that makes the view out of the window better
  • 💬 Ideas, bugs or flight reports? Open an issue
  • ⚡ Fun fact: the DDS/BC1 texture encoder in OrthoStreamXP is hand-written

🛩️ Featured project

OrthoStreamXP mounts a virtual file system over your existing X-Plane 12 scenery packages and builds photo textures from online aerial imagery the moment X-Plane asks for them. It loads the area ahead of your aircraft first and keeps a cache for the next flight.

📡 Scenery on demand Imagery is downloaded as X-Plane needs it, not region by region
🧭 Look-ahead loading Follows your aircraft over UDP and prepares the area ahead of you
🎚️ Simple presets Balanced, Sharp, Ultra or Extra, with recommendations after each flight
🎨 Natural colours Evens out patchwork photos, seasonal tint, exposure control with live preview
💾 Managed cache Size limit, automatic eviction and a visual cache manager

Download Stars License


🧰 Tech on board

C# .NET 10 WPF WinFsp SkiaSharp xUnit GitHub Actions X-Plane 12


☕ Support the hangar

OrthoStreamXP is and will stay free. If it gave you a flight worth remembering, a sunrise over the Alps or a final approach into your home airport, a donation buys more time for sharper textures, smoother loading and more natural colours.

Donate with PayPal

Blue skies! ✈️

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  1. OrthoStreamXP OrthoStreamXP Public

    Stream real-world aerial photo scenery into X-Plane 12 as you fly: no region downloads, no preparation. Free, open source Windows app for Bing, Esri and more.

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  2. flysimdev flysimdev Public