There is an anomaly with polygon rendering between Xbox and PC. When a polygon is used to exclude unwanted trees it does not render properly on Xbox.
Here, a polygon is placed with transparency set to 0 and left at layer priority 0.
On the PC platform this is rendered fine:
On Xbox it renders as follows:
This seems to be a bug between the two platforms that needs to be addressed, there shouldn't be large visual differences like this between PC & Xbox.
This appears at all of our scenery products where polygons have been used on grass to remove unwanted trees.