(In reply to comment #7)
> Thanks, exporting force_glsl_extensions_warn=true does fix the rendering of
> tropics!
> Should I close the report or is it considered a temporary workaround?
> 
> As a side note, exporting
> MESA_EXTENSION_OVERRIDE=-GL_ARB_shader_bit_encoding does not change anything
> for me in heaven 3.0. It has always been rendering correctly, so the
> override does not fix anything, or maybe I never stumbled upon the missing
> parts I am supposed to see...

Maybe it depends on h/w and or settings (defaults I suppose may be set
according to what heaven detects - untested).

I just tried on my HD4890 and without that I don't get any lighting/nice
effects so it looks very plain/matt.