Gravel - Photogrammetry based Environment Texture
Another approach to gravel. This time I pick a bigger gravel type .. the surface itself is a kind of mix of gravel and construction site debris.
To get better and even more even image coverage for further reconstruction, instead of using markers I decided to use the second ruler. It complicates the capture a bit but increases coverage accuracy. I managed to capture 116 images (115 for reconstruction and 1 with the color checker for color calibration). Surface was reconstructed in Metashape, baked in Substance Designer baker and tiled by AI in Artomatix. As expected Artomatix did very fast and good job in seam removal. Again, wasnt able to find any noticeable seam transition.
This is my photogrammetry workflow - still experimenting with 'Artomatix' and replaced Photoscan with Metashape (more details regarding to my workflow at: https://www.artstation.com/artwork/K0PYG)
The source - the surface I captured.
TO cover area marked with green I took 116 images. The focal length was set to 35mm. Instead of markers to mark capture progress I used the second ruler. It helps to get better and more even surface coverage.
The Source - surface details with my shoe, ruler and the color checker used as a scale reference
The reference image with the Color Checker I used to calibrate final color in PhotoLab2
Metashape preview - surface reconstruction based on 115 images.
ZBrush - lowpoly coverage over highpoly scan - I covered 180x180cm of real space
Artengine Artomatix in action - in 2D view I masked areas I wanted to be skipped by AI during seam removal and texture reconstruction. In 3D view I preview how texture looks when repeats itself 3 times
The final 1k PBR material preview