Gravel - Photogrammetry based Environment Material
This material was captured as part of my research for this video:
https://youtu.be/c7tI6ICo23I
where I tested surface capture with the flash and full cross polarisation but without any additional supportive stabilisation.
It was pretty painful experience as holding 4kg in front of myself as steady as possible on fixed height and fixed angle, far enough to do not frame my own shoes isnt as easy as it might look like. This capture was the one which really convinced me to use a tripod for ground surface captures. If not the result I realy like, I would consider this capture as a failure. I messed with camera setting, my arms were exhaused after the capture, and at the end the rain started. This is why I didnt take more documentary shots to share them with you.
But since I really like the material and texture-set I have added it to my material's library:
https://gum.co/WJAQy
as 'gb_gravel299'
For those interested in details, I used my standard material workflow which can be found on my youtube channel:
https://www.youtube.com/c/GrzegorzBaranArt
Cheers!
Grzegorz
PBR preview: Albedo / Normal / Height / Roughness / Ambient Occlusion
Tiling preview rendered in Marmoset Toolbag 4
Source Location - a place I captured this surface marked with rulers. This is the way I held the camera and took 184 images for further photogrammetry reconstruction. To capture it quicker I set the camera focal length to 27mm
DX0 PhotoLab - photoediting before/after. I set the White Balance, increased contrasts, flatten AO shadows, removed vignetting and tweaked some values to get proper luminance distribution.
Agisoft Metashape - 134mln poly dense photogrammetry reconstruction based on 184 24Mpx images.
Agisoft Metashape - a close up to show level of details for reconstructed geometry
ZBrush - low poly plane alignment for texture baking
The material and texture-set was added to my material's library:
https://gum.co/WJAQy
as 'gb_gravel299'