PixelPerfect Orthographic Camera with Blocks for a PixelArt 2D Look

Questions
2

Set the renderer antialiasing to true

renderer = new THREE.WebGLRenderer({ antialias: true });

This is not the most optimized way to render a grid, you should use a Shader or a LineSegments, take a look at the GridHelper source code for a LineSegement implementation, or this InfiniteGridHelper for a Shader implementation.

Or you can simply use one of them.

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