Adding possibly real time weather update or a wind map that can have an effect on the grass and trees as well as airplanes and ocean waves, possibly adding aurora near the poles as for the terrain waterfalls rivers lakes and more texture variations that correspond with the area and season, sun rays or also known as God rays that can interact with the clouds as they pass by also creating actual shadows on the ground, volumetric clouds, and the options to add several cloud layers as well as several wind layers and even air pockets this would apply well for flying, rain snow fall maybe in the future Outerra can simulate snowfall and actually cover the ground with snow as a result of the snow fall, that's some ideas a vision for Outerra engine.
