Quote - kawecki - that system works, but how long does it take you to set up a new scene from scratch, to find the images, size them, apply them, correct them, etc.

Well, as I almost don't do aerial scenes, I already have all what I need, a background plane, a fog plane and a tiled ground plane and some tiled terrains. The setup is very fast.
Now comes the textures and here is the problem, it can take hours to find one.
I can make a scene, pose the figures and even make some props in 30 minutes, render in few minutes and spend five hours finding a texture.
Is not by itself so difficult, I have a good presellected textures of excellent rendering quality (some textures can be bad and very low quality if you look at them, but render in a marvelous way).
I have 5GB of this textures in my HD, the models that I have have a good mapping.
The problem is to find one that express what I wanted to do, sometimes the first that picked was exactly what I wanted, so it takes seconds and the final image is done in less than an hour, other time I have to pick tens, render to see how it looks and try again and sometimes I quit.
As for aerial images I discovered with my example is that I need to make a morphing ground plane, once is done it will be very easy to use for aerial scenes and other.

As for pre-made scenes I only have done a forest. A ground with a lot of trees, you can move and rotate the camera within some limits and there are trees there, even has a road.
For keeping the number of polygons low the tree have no top and are only a low poly 8 side cylinder. For what the top if your camera doesn't see it?

Stupidity also evolves!