Domestika - Matte Painting Techniques for ArchViz

https://www.domestika.org/en/courses/2451-matte-painting-techniques-for-archviz/final_project_lessons

Optimize your architectural models in an efficient way and enhance the final image through matte painting
Matte painting is the art of creating scenes and settings by layering images. And for architect and ArchViz expert Fran Mateos, this technique enables him to showcase the full potential of yet-to-be-constructed projects while telling an engaging and detailed story about each space.
In this course, learn how to efficiently optimize your architectural models and enhance the final image using the matte painting technique. Your instructor teaches you how to achieve the perfect lighting and scale as well as layer your renders with fine details that leave viewers thinking they're real.