Complex sentence: David's style is more fluid than van Eyck's, showing less concern with a forensic approach: his lines are easier, avoiding diagonals in favour of balanced verticals and horizontal strokes, and he tends towards deep and harmonious colouring.
Split into simpler sentences: David's style is more fluid than van Eyck's, showing less concern with a forensic approach. His lines are easier, he avoids diagonals in favour of a harmonious balance of verticals and horizontal strokes and tends towards deep and harmonious colouring.