High Quality PBR War Cannon from a personal concept
Model on sale on CGTrader
https://www.cgtrader.com/3d-models/military/gun/pbr-war-cannon
The provided model has been created inside of Autodesk Maya (version 2016) - Sculpted in Pixologic Zbrush, textured in Substance Painter and rendered with different render engines ( Arnold 4 By Solid Angle and Marmoset Toolbag 3 package).
Cannon shot