Variable max texture size on WebGL depending on browser

[dbirman]

https://browserleaks.com/webgl

const canvas = document.createElement('canvas');
const gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl');

// Check if WebGL is supported
if (gl) {
    const maxTextureSize = gl.getParameter(gl.MAX_TEXTURE_SIZE);
    console.log('Maximum texture size:', maxTextureSize);
} else {
    console.log('WebGL not supported');
} 

[dbirman]

https://docs.unity3d.com/ScriptReference/SystemInfo-maxTextureSize.html

[dbirman]

While fixing this also replace SetSelectionLayer loop with Array.Fill(pixels, transparent);