https://www.rimworldtools.com/tags/performance/ Recent content in Performance on RimWorld Tools — Calculators & Guides Hugo en-us © 2026 RimWorld Tools · Fan site, not affiliated with Ludeon Studios · Powered by fansweb Sun, 18 Oct 2026 00:00:00 +0000 https://www.rimworldtools.com/news/2026-10-18-waylith-engine-update-1-7/ Sun, 18 Oct 2026 00:00:00 +0000 https://www.rimworldtools.com/news/2026-10-18-waylith-engine-update-1-7/ <h1 id="rimworld-update-17-the-waylith-engine-arrives">RimWorld Update 1.7: The Waylith Engine Arrives</h1> <p><strong>RimWorld update 1.7</strong> is the biggest technical change in the game&rsquo;s history: Ludeon Studios announced on October 12, 2026 that the game is moving from Unity to the <strong>Waylith Engine</strong> — a custom in-house engine — with performance improvements of <strong>2-4x</strong> in their tests. The main Steam branch stays on 1.6 for now; 1.7 is playable today on the unstable beta branch.</p> <h2 id="what-changes-in-17">What Changes in 1.7</h2> <ul> <li><strong>Same game, faster engine.</strong> The game &ldquo;looks and plays exactly the same,&rdquo; but startup, load times with big mod lists, map generation, world generation and ticks-per-second all improve.</li> <li><strong>Stress-test results.</strong> Ludeon saw a late-game colony run at <strong>2.2x better performance</strong> than on 1.6, and a 1,500-mod pack load in <strong>6 minutes instead of 14</strong>. Individual results vary by PC and mods.</li> <li><strong>Save compatibility.</strong> Your 1.6 savegames load on 1.7, and 1.7 saves work if you switch back to 1.6. No action needed from players.</li> <li><strong>Mod compatibility.</strong> The vast majority of mods work on 1.7 without author changes. Some show a yellow &ldquo;potentially unsupported&rdquo; warning only because the version number changed.</li> </ul> <h2 id="what-this-means-for-modders">What This Means for Modders</h2> <ul> <li>Most mods need <strong>no changes</strong>; Ludeon asks authors to publish a version marked 1.7-compatible so the yellow warning clears for players.</li> <li>Waylith gives modders more power: latest <strong>C# language features</strong>, easier high-performance complex mods, and more accessible big visual effects.</li> <li>Over two dozen modders helped test Waylith before launch.</li> </ul> <h2 id="how-to-try-update-17">How to Try Update 1.7</h2> <ol> <li>Open Steam → right-click RimWorld → Properties.</li> <li>Select the <strong>Betas</strong> tab and choose branch <strong>&ldquo;unstable&rdquo;</strong>.</li> <li>Restart Steam if needed, then choose &ldquo;Play 1.7 Unstable&rdquo;.</li> </ol> <p>Note: 10+ year-old PCs may not run 1.7 — report issues on the official RimWorld development Discord.</p>