Ubuntu/WRF/Isosurface problem

[sgpearse]

Graphics Card: AMD Radeon RX550/550 Series
Raycaster: Curvilinear
Occurs on: Ubuntu18, Ubuntu20 (not Windows or CentOS7)

To reproduce:

1. Import WRF data
2. Create an isosurface.

Here's approximately what it should look like:

[sgpearse]

Note:

Graphics Card: AMD Radeon RX550/550 Series
Raycaster: Curvilinear
Occurs on: Ubuntu18, Ubuntu20 (not Windows or CentOS7)

[sgpearse]

@sgpearse will try updating drivers on Ubuntu systems

[sgpearse]

@StasJ PPA third party repository driver screenshot below. It's much better, but there is red speckling around the domain frame.

[clyne]

@sgpearse can we close this after @StasJ backs out the changes for #2800?