Created attachment 139582 [details]
Picture of Age Of Wonders 3 rendering problem on 18.1.0-rc's

NOTE: This is for the 18.1 branch for the current RC's, you can reproduce this
bug on the radeonsi driver using the git tag 'mesa-18.1.0-rc4'. This bug has
NOT been replicated on the 18.0 branch.

Overview:
Age of Wonders 3 game displays large white squares on menu screen. No buttons
are available in menu screen. 

Steps To Reproduce:
Fire up Age of Wonders 3 in steam using radeonsi driver on 18.1.0-rc* releases.
The problem should present itself in the menu of the game.

Hardware: 
R9280, RX480, and R9Fury have this problem.

Builds:
This bug has been seen on Mesa RC's of 18.1.0 

Attached is a screenshot of the problem.