Procession of the True Cross (Procession in St. Mark's Square)

Begin with a light sketch to establish the perspective and placement of major elements like the buildings and the procession.

Block in the basic shapes and values of the buildings, paying attention to the receding perspective.

Add details to the architecture, focusing on the arches, windows, and ornamentation of St. Mark's Basilica and the surrounding buildings.

Establish the ground plane and begin to populate the scene with figures, starting with the larger groups in the foreground.

Refine the figures, adding details to their clothing and faces, and varying their poses to create a sense of movement.

Add highlights and shadows to create depth and dimension in the buildings and figures.

Pay attention to the atmospheric perspective, making distant objects appear lighter and less detailed.

Add final details and adjustments to create a cohesive and convincing scene.