On the mausoleum, I'm not sure what you've got for reference, but columns don't typically go all the way to the roof in this style of ancient Greek architecture. The roof sits on the beams which sit on the columns which sit on a plinth which sit on a platform (its much more complicated than this, but only architecture…
Great stuff with the color grading advice @MeshMuti! I really appreciate your willingness to go after this and make big changes! That being said, the Aug 17 screenshot is OK, but I might try using a program like PureRef and overlaying a transparent copy of that mock-up by @JesseL and matching your camera and assets to it.…
What is the light source in the scene?I am asking because it seems fairly bright, warm and evenly lit for a nighttime scene, almost if it's lit by weak sunlight. I did a quick mockup in photoshop, with some adjustments to the colours and brightness. By darkening the scene and removing some of the general warm colours, you…