Modular Structures Tutorial Series
Dan john cox game ready modular structures
Dan john cox real texturing
Dan john cox sculpting modular structures

Here's a sample of images from my tutorial series about making Modular Structures. I did 5 in total, conception, hard surface modeling, sculpting, lowpoly, baking and texturing. All of these are available at Pluralsight https://app.pluralsight.com/profile/author/dan-cox