Cobblestone - Photogrammetry based Environment Texture
Cobblestone surface I captured practicing photogrammetry with the monopod. It is also another experiment with the best working surface coverage since 2 meters by 2 meters seems to be slightily too much and loose surface details I usually expect to see on the texture. Currently I am aiming in something around 1.75 x1.75m.
PBR channels preview
This is my photogrammetry workflow (more details at: https://www.artstation.com/artwork/K0PYG)
Source - captured area
Source - shot surface details and my shoe as scale reference
Source - capture using monopod to stabilise the camera. To avoid direct shadows I picked the surface hidden in a buildings shadow. With the focal length set to 24mm and f/4 I managed to get 1/250sec of average exposure time.
For those who might need it for substance color picking etc.. here is the reference image with Color Checker I used to calibrate albedo.
Substance Designer - final tweaks and additional PBR maps generation (rougness and heightmap)
Reconstruction in Photoscan based on 83 images
Lowpoly over highpoly surface coverage in Zbrush
Substance Painter - Manual seam removal with the 'Clone Tool' before and after.
1k material preview