Rock cave tunnel in hand shape Low-poly 3D model

Man made rock cave tunnel in hand shape with a little hill 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. Most of images were rendered with Eevee, some of them were rendered with Cycles. 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 sci-fi movie, real movie, any type of animation or for game assets. In this model, caves or tunnels system was designed with 8 entrances located in fingers, hand and writst. They look like a man made tunnels or caves system in rock material, ground floor was bent slightly to make it looks like a little hill. There were two versions with dimensions: 6.69 x 2.43 x 0.31 m ( rock caves with height in average value), other one dimension: 1,342.14 x 495.67 x 38.53 m ( rock caves with height in average value). The bigger ones in files have name: cave_real. Total vertices for both versions: 1,208

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

Avaiable formats: obj, fbx, gld, stl. Images textures, uv map for both caves and ground in zip files.

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