Created attachment 121038 [details]
It occurs with RV730 and NI/Turks XT.
I've set Hardware to 'All' cause both x86 (IA32) and x86-64 (AMD64) are broken.
'all three 'raytrace' variants' mean:
Have a look at the attachments.
Created attachment 121039 [details]
Created attachment 121040 [details]
Does it have something to do with the yellow colour?
It is in all there variants in the below, right and yellow coloured sphere.
For me it works correctly with current mesa-git and a 6870 HD (Barts).
it works correctly with current mesa-git and a RX580 (Polaris 20), now.
will try with my old 6670 HD (Turks XT) when I find more time to switch it back in.
But good progress so far.