You could use Blender to bake your texture maps and to paint textures. Would be also a good program to optimize your UVs in, if necessary. Alternatively, you could bake texture maps in XNormal. It might be good to include your system specs (what is "low minimum requirements"?).
it looks like they send the terrain to the GPU as a texture and generate the mesh there instead of making a mesh and sending that to the GPU. This isn't exactly revolutionary - in fact, it's generally what you should be doing. you don't have to store lods, you can take advantage of your texture streaming system, you can…
Fully 3D Cartoon explosion effects driven by the particle system to animate their speed, size and shape. Explosion Nuke Cluster bomb Car Fire Shockwave Small Chemical Strike Flesh Tech
Today I noodled around with the start of modular pipe system for the detail pipes: And I also threw together a first modeling pass for the upper windows: