Trying to steal Vray's thunder.
I'm gonna wait for Steam version
Gumroad user sebvhe has a nice free tutorial on creating tileable textures from photogrammetry. The guide covers the whole process from using camera to create all the necessary maps to use in engines.
The artist is using a cobblestone texture for this tutorial, which you can get for free here.
It is worth noting that basic knowledge of Photoshop, any 3D app, and the high poly to low poly workflow is required to understand the guide.
The artist uses software such as Agisoft Photoscan, Photoshop and ZBrush. You can use any similar tools. For example, you can get started with Autodesk 123D Catch for free.
Make sure to check out sebvhe’s other projects here. Free materials, awesome texture packs and more.
Preview image by Matthew Moult.