I think it's press board. Like old fashioned MDF, or high tech insulbrick. I seem to remember ripping it off houses before.

Might be actual shingle siding that's been painted. Hard to tell from the photo. Maybe take one off and take it to a building supplier and ask them what they think it is.

Yes, I was actually going to say this is cedar I think because it looks like a place we rented once and I had no clue the siding was cedar until it got humid and you could literally smell it coming off the place. But also the little birdies would drill into it and live in the walls...which was a first.

p.s. - Do you smell cedar when humid? Cause that's a huge tip off =P!