Middle-Earth: Shadow of War - Vegetation | Material Shots
Live Oak Bark

Live Oak Bark

Live Oak Bark Burnt (to blend to Live Oak)

Live Oak Bark Burnt (to blend to Live Oak)

Diseased Beech Bark

Diseased Beech Bark

Pine Bark (initial pass by Matt Rapelje, I finalized it)

Pine Bark (initial pass by Matt Rapelje, I finalized it)

Spruce Bark (based on calibrated photo ref Eric Holman took)

Spruce Bark (based on calibrated photo ref Eric Holman took)

Bald Quercus Bark (to blend to Quercus Bark)

Bald Quercus Bark (to blend to Quercus Bark)

Quercus Bark

Quercus Bark

Here are all the barks I ended up creating for all the tree variants across all 5 Open World levels of Shadow of War. There was lots of re-use of these between levels and even eventually to create the canopy textures, bush branches, etc. The bark was always the starting point for me when I started on a new tree as lots stems from it.

I used photosourcing techniques on this with heavy cleanup for PBR. I also used Zbrush to generate a clean heightmap and a clean-reading normal map, focusing on large shapes (baked in Substance Painter). Any finer detail was generated with nDo/Photoshop at the end. With this workflow, turnaround time for final-ish bark could be 0.5d-1d, depending on complexity. Was even able to use tessellation/displacement on the trunk for the PC version of the game!