Medieval-Fantasy Houses Development Sheet

I've imagine this houses as reference and resource for a RTS Videogame, a little close to a city simulator, practically it is focus on base management with multiple resources: from raw material to different source of food. It could be a mix of "Anno" series, the old "Settlers" and "Knights and Merchants". From a little camp of tent the player develops a little village to a medieval city with a progressive evolution of the population and buildings. I've drawn them with Procreate on my tablet, then I upload the pictures on Photoshop 2014 for the final presentation.