Blocking out an Environment for Real Time

How did I deal with… blocking out an environment for real‑time
Producing Art. Part 1: https://www.3dartviz.com/skills/skills-management/establishing-guidelines-real-time-pipeline.html#producing-art-part1
At this stage of the project, I need some objects to apply the C++ logic to. I'm blocking out environment and characters to ensure that my programming is functional on the placeholder models. This is my environment block out.