I find no difference in difficulty whether I am painting something alive or inanimate. I paint their gesture and energy. When I am painting the rocks I feel myself as a rock. The gesture of the rock comes from its skelton-like creation standing up to water and wind. When I am painting the ocean water instead of picking a still moment. I do a dance of gestures as though I were to paint. I feel slish, slosh, kazame of water moving into the rocks pushed by weather and tidal forces. My muscles do the planning in a state completely in the moment. Theoretically my goal is to live in tha moment.
The end results do not always flow. But when they do I am pleased.