Sol-Attn quality comparison — MiniMax H3, 362 frames

Same seed, same prompt, same 20 steps at 1344×768. Only the attention configuration differs, so every visible difference between these columns is the sparsity setting and nothing else. Click any frame to enlarge.

What to look for. Block-sparse routing fails on fast motion, fine repeated detail and hard edges — so check the spokes in shot 2, the railings and scattering pigeons in shot 3, and rain streaks on the lens in shot 4. The two amber columns are flagged because their audio track already deviates most from the baseline (+1.2 and +1.6 dB mean); timing alone would have picked them as the winners.