As I visited diverse locations across Mainland Orkney, I collected three-dimensional models of a series of distinctive textures.

Photography and photogrammetry at Corrimony, a Clava Cairn near Inverness, Scotland

The first in a new series of BBC TV's Grand Tours of Scotland's Lochs was broadcast this week, and the first episode features an interview with me at a rock art site in western Scotland.

Ketley Crag, near Wooler, is an unusual rock art sites set within a rock shelter.

A rather grey day was ideal for recording three dimensional models of the largest panel of rock art at Chatton Park Hill, near Wooler.

Increasing cloud cover this evening presented excellent conditions for capturing two rock art sites at Lordenshaw, near Rothbury, in three dimensions.

A walk in the central Lake District, featuring a dynamic cloud formation and Neolithic worked stone.

Overcast skies towards the end of the day provided excellent conditions for capturing this complex rock art carving in 3D.

At Goatscrag Hill is an array of distinctive sandstone cliffs that overlook the Milfield basin. The walls of an overhanging rock shelter are distinguished by unusual carvings of animals.

The light this afternoon was great for creating a 3D model of the cup and ring markings upon a large boulder at Old Bewick.

It's an overcast afternoon in Hoy, ideal for recording the Dwarfie Stane in 3D using structure from motion photogrammetry.