Whether it's a large-scale model or a diorama, each model is designed from inspiration. Some builds come from a suggestion, some as a passion project released to the world. To begin the build process, I will often look up research images just like these!
All my models are made with Stud.io, which you can download for free! The program is easy to use and even has a highly realistic rendering tool. Stud.io is constantly updated by the Lego Group, so new pieces are added almost every week.
Once in the program, I will start by building a rough model, or depending if it's a layout diorama, I'll start by building the layout first. Without a so called "foundation," the many details seen throughout a MOC cannot be built. Some of the time, personal Easter-eggs are added into builds.
Once a model is complete, I will render a series of images. Those images will appear in my videos, as well as being used in animations.