The image displays a square cut-out revealing layers of a roof structure:

Oriented Strand Board (OSB) decking forms the bottom layer, with visible wood fiber strands and evenly spaced nails.
Plywood panels make up the sheathing layer, featuring a woodgrain texture, knots, and nails.
An orange underlayment membrane serves as a moisture barrier.
Individual asphalt shingles, in slate gray with granular texture, form the topmost layer.
The cut-out offers a clear view of these layers, showcasing their materials and textures in detail.