To be sure that it wasn't anything else, I reinstalled the graphics drivers and the game. These render issues persist.
In the Ogir and Nam-Yensa Sandsea locations, distant scenery and buildings have an abrupt distance where they start appearing as if passing through an invisible wall.
In the Giza Plains during rainy weather, some foliage doesn't apply the alpha channel properly. Somewhat random bug as it's not a 100% chance of happening.
In the Paramina Rift location, a snow effect is being displayed over geometry only and also changes / fades with distance and camera orientation.
A Reddit user informed me that the 18.2.1 didn't have this issue. Did anyone else?
16GB DDR3 Ram 1333MHz
RX Vega 64 - 18.7.1 Drivers
Windows 10 Pro 64-bit
This is mostly a user to user help forum.
You can use the 'Report Issues Online' from the radeon settings(there's no back & forth replies), and/or try https://support.amd.com/en-us/contact/email-form
I don't have the game, so can't offer any suggestions.