On what basis should the quality of colour filling and blending be evaluated most comprehensively?

Correct answer: On the combined effect of evenness, edge control, tone, colour relationships, surface, medium, depth, mood and compositional purpose

Comprehensive evaluation follows the principle that technique serves visual purpose. Judge whether fills are even where required, edges are controlled, tones and colour relationships support depth, and the surface and medium are handled appropriately. Also consider mood and the composition’s intended effect. Counting colours, measuring brush size or judging brightness alone ignores too many factors to describe the actual quality of the work.