Fun With Abstract Patterns 2

Following on from my previous post, here are a few more abstract patterns.

Can you guess what they are? - Answers below the pictures.

Photo 1 - This is the unpainted steel beams and concrete slab in a new multi storey car park.
Photo 2 - This is an extract from a sunset behind silhouetted trees.
Photo 3 - This is the end of a Chocolate Labradors nose. (Thanks Arthur!!)