I'm trying to make some new textures for the game. I haven't enough draws for the moment to create a texture pack but I have tried to make one or two things. You can find in particular :
-new greenhouse (not animated), silo, shelter and lander;
-new grounds for mars (with a dark red at the beginning);
-an isometric magnetic grid for 1x1 draws in svg format. The grid helps you to create isometric draws with Inkscape.
Some textures are also ugly or bad adapted for the moment. But I let you my work folder. To add some of these textures to your game, goto modding, create textures and import the .svg or .png files in the right place. And... enjoy.