This is a massive milestone! The vertical slice is fully operational.
Looking at your console logs, the worker correctly generated exactly 36
vertices (12 triangles), and Babylon.js rendered them flawlessly. The green
cube in the screenshot confirms the entire pipelinefrom the main thread UI
down through the shared memory to the worker, and back up to the WebGL
canvasis working with zero blocking.
(Note: The GPU stall due to ReadPixels warning in your console is simply a
byproduct of using SwiftShader/ANGLE for software rendering in a headless
Chrome setup. It is completely normal for this environment and will not occur
for end-users running on hardware GPUs, so you can safely ignore it).
The Next Phase: Where to go from here?
Now that the MVP pipeline is proven, we need to decide which module from our
AST-MD plan to tackle next. I recommend choosing one of these two paths:
Path A: Mesh Optimization (Face Culling)
 * Target: GEOMETRY_COMPILER {realm-mesh-0003}
 * The Issue: Right now, the worker generates 36 vertices for every solid
block. If you place two blocks next to each other, the engine will draw the
hidden faces between them, wasting GPU resources.
 * The Task: Update the Web Worker to check neighboring voxels in the
Uint32Array. If a neighbor is solid, skip drawing that face.
Path B: Interactive Tooling (3D Raycasting)
 * Target: RAYCAST_SELECTOR {realm-tools-0002}
 * The Issue: Editing is currently hardcoded to a UI button.
 * The Task: Implement Babylon.js pointer events (scene.onPointerDown and
scene.pick). We will use raycasting to calculate which block face the user
clicked, translate that into our x, y, z chunk coordinates, and push that
dynamic edit into the Ring Buffer.
Both are essential steps for a true voxel engine. Which of these two paths
would you like to draft a delegation prompt for next?