Outline two more trunks for smaller trees in the middle area, between the existing trees. Add some heavy, pointed branches to the larger tree trunks. Form layers of snow on the pine trees by drawing angular shapes with squiggly lines. On the main fork of the larger tree, draw a patch of snow with a rounded triangle. Then sketch a long, narrow oval on the trunk of the tree. Add curved lines under and beside the trees to look like snow drifts.