Plugin for blender that can output spritesheets for nova
I found a plugin for blender on the internet by Jorn van de Beek that made 32 part spritesheets of models. I altered the camera so that it rendered the parts in something close to the angle used in nova. If you know how to use blender, you can import your model in and set the textures checking the render so that it looks good and then use the strip render script to make the 8x4 sprite sheet.
select strip render once done with the set up. You will have to change the output folder.
Press Alt + P tp start the script. Choose the size you want.
Save the image in any format and you are done.