To model the wood crates in Houdini, you will focus on a kit of parts that can be combined to create a variety of props. This workflow includes the use of noise to add wood grain to the panels. Again these details will be converted into a volume and baked. You can then combine the parts in Houdini or later in your game engine.
PROJECT FILES & RELATED TUTORIALS: https://www.sidefx.com/tutorials/dungeon-props/