This morning I decided I would join the Friday Sketchers for an Adhoc sketchouting at St. Mark's Cathedral. One of my favorite venues for sketching. It had great light streaming in through the south windows which drew me to the light and shadow on the column and urn on the left side of the altar. However by the time I finished by sketch the light had moved or a cloud diffused the strong light and shadows. Take a picture first when you see something that draws you to a view or space. That way if things change you can refer back to it.
Here is the sketch.