The newer 15k (15360x8640) or 14k (14080x7920) screen-shots first (more will come). You would need an 8x8 matrix of Full HD or 4x4 matrix of Ultra HD to view those full.TressFX was set to "on", but TressFX disables itself since I run out of video memory in that resolution.
The "older" scenes in 10K.