This is how my design flow works in conjunction with Blender Opensim and finally into The Lost Castle simulator.
I like to use Opensim as my sketch pad this where the original idea takes shape. It is easy to do a quick sketch with a few prims and easy to move around and get a feeling for the design.
I Start in Opensim, The Lost Castle merchant area outside the castle moat.
The intention is to Build a Boat shed and living quarters for local boat builder.
After the concept is roughly laid out and a few measurements taken in world I open Blender. The design will be an all mesh design, like most of our work in The Lost Castle.
I make the first simple mesh in Blender and then import it to TLC to make sure I have the right proportions.
The import is an ongoing process between Blender and TLC checking up to see that the conversion between Blender and Opensim is right.
I like doing this often to make sure I am on right track I also find it hard to get the right feel for things in Blender I like to walk around with my Avatar to make sure the design works in the simulator and looks in proportion.
(We can talk about scale all day long and not really going nowhere this is a bit of difficult part with this type of simulation the camera is behind the Avatar and higher so to walk around in comfort we have to have that in mind but that is for another day).
Often when I import the mesh I see how I can make improvements and I add prims and build in world as I would normally do. Ahh if I had a tool to export what I just done so I could bring the edited mesh back into Blender that would save me lots of time. However now I go back into Blender and build that into my mesh what I just edited in TLC.
You can see how this design evolved from the original concept to product in this album
pictures tells it better than words.