dpr

src/client/render/gl/Renderer.ts

@@ -210,7 +210,6 @@ export class GPURenderer {
       alpha: false,
       antialias: false,
       powerPreference: "high-performance",
-      desynchronized: true,
     });
     if (!gl) throw new Error("WebGL2 not supported");
     this.gl = gl;

src/client/utilities/Dpr.ts

@@ -5,6 +5,10 @@
 // or camera ↔ screen coordinate math will desync.
 const MAX_RENDER_DPR = 1.5;
 
+// BISECT: sub-native render scale to test whether fill rate is the bottleneck
+// on low-end Chromebooks. 0.5 = 1/4 the pixels. Visibly softer.
+const RENDER_SCALE = 0.5;
+
 export function getEffectiveDpr(): number {
-  return Math.min(window.devicePixelRatio || 1, MAX_RENDER_DPR);
+  return Math.min(window.devicePixelRatio || 1, MAX_RENDER_DPR) * RENDER_SCALE;
 }