Rock - Photogrammetry based Environment Texture
Another rock surface I captured recently. That one was pretty hard to get due to the Sun light angle and tough access to the surface itself. I used the shallow cliffs ledge so the camera's movement was very limited. Even if I took 45 images, I took them all just from 4 different positions. Without good access to the surface I decided to shot from the distance with the focal length set to 88 mm. To compensate a bit more depth as usual and weird and limited angles, this time I set the aperture to 16.
The capture was worth a try in my opinion. I love the the captured surface's rocky shape and how generic is still is.
After that capture I also captured a few nice 360 HDRI panoramas and used one of them as a light source to present this material.
To get more details feel free to follow my blog. I am planning to add this one as a part of my next 360 HDRI Panorama pack and release it in a future.
This is my photogrammetry workflow (more details at: https://www.artstation.com/artwork/K0PYG)
The source - I used tripod to stabilise the camera.
The source - surface details with my shoe used as a scale reference.
The source - captured area preview
The shitty Sun angle which also affected my capture and limited angling. I used my hand as a lens hood :)
The reference image with the Color Checker I used to calibrate albedo
Photoscan - camera positions and reconstruction in Photoscan based on 45 images.
ZBrush - lowpoly over highpoly surface coverage in Zbrush.
Substance Painter - Manual seam removal with the 'Clone Tool' before and after. Feel free to watch my youtube tutorials to get more details about the process.
2D preview of 360 HDRI Panorama I used as a CG source of light to present the material. Planning to add it to the next 360HDRI Pano Pack I am working on.
..and the final 1k material preview