I tried using the SCNFloor and Material, but it draws with limited width and length.
Is there any way I can generate an infinite grid.
Probably this could be the issue: Have you checked the zFar value of your SCNCamera? the Default is: 100m (this means everything that's more fare away is clipped by the renderer) - you might want to set it to a really high value and also disable the automaticallyAdjustZRange property (what should be the default). Hope I could help you.