I am sorry, it was late last night and I forgot I could share some scenes not showing everything.
Here are some screen captures I made.
Maybe it is a bit difficult to see in the images, but that platform is supposed to be 10 meters long, and the human figure is around 1,80 m. The environment looks blurry and big. I tried with the different environments but they look all the same. In Shade you can see the girl is to scale at 1820 mm tall.
But when I create a new scene and include the girl only as an example, here are the resulting images:
Here the grass looks to scale with the woman, and again in Shade she is 1820 mm tall:
I am not sure if I did something wrong at some point with the scene, at one point I tried selecting the Shade 3D model node and changing its scale to a larger size, but the results were the same. The camera settings are the default for both scenes.
Any help will be really appreciated, thanks!