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- Checking `DrawSize != Vector2.Zero` is too specific. It could also crash on zero-height-but-non-zero-width, or zero-width-but-non-zero-height. - Take the `gridCache.Validate()` call out of the zero checks, because even if the width or height are zero, not generating anything is valid and there is no reason to validate every frame until `gridCache` gets invalidated again.