Quote - Yep, those are your buckets.  Noticed you have them set to 16 which will be smaller when rendering.  setting your min. shading rate will improve the resolution quality.  I set mine to 0.2-0.3.  Excellent example.

I have my min shading rate set to this as well, but sometimes I make it 0.00 if I want to see every detail on a texture, mainly for checking purposes - seams, that kinda thing ;o).

Laurie