Rock moutain with valley and cave Low-poly 3D model

Terrain model with rock moutain,cave and vally in scene. Nice topology model as shown in attached images. Models are seperated into many parts so they are easy for users to modify for other purposes of using without getting any problem. I didn't use any modifer in Blender as well as plugins. Images were rendered with Eevee. Render quality as shown in pictures.

Make sure quad only, no vertice with more than 5 edges in model as per CG trader standard, a bit problem with UV stretch, other parameters were verified by Kodama. I also attached screenshot of verification by Kodama in attached images.

It is an idea for both scientific movie, real movie, any type of animation or for game assets. In this model, I design landscape with rock moutain, 8 caves and one valley. They look like a colosseum with 8 gates in both virtual life and real life version. Dimensions of model in real life: 1077 x 447 x 154m, total vertices: 1728. They locate in the files have name: valley_real.

Avaiable formats: fbx, glb, obj, stl. Images textures in zip files.

For anyone who use Blender, I already set up simple world scene with blue sky and white cloud in Blender file, it is very convenient to make more pictures.

Any question about model buidling process, any idea to improve model quality, please let me know.