Use the (from the drawers) on the bird in the cage to get a piece. One is located inside the kitchen sink. Winter: Found inside the oven. Another is hidden behind the fuel tank. Arles (Painting Pieces)
In this chapter, you must collect four photo pieces in each season to complete a picture in the frame. One is inside the kitchen drawers.
Look behind the paintings and interact with furniture; some pieces are hidden in plain sight on the walls or behind objects. General Tips for the Collection
Click on the window repeatedly; a piece will appear on the glass. Find one in the drawers.
If you are stuck on a specific piece, you can use the Rusty Lake YouTube Channel or the official Steam Community Guide for full walkthroughs of each game.