Now this starts to become interesting, a fluid simulation add-on for Blender, under $100. Would be great in combination with Terragen.
I must definitely free up time to learn Blender.
https://gfycat.com/samefilthykawala
https://blenderartists.org/forum/showthread.php?445158-FLIP-Fluids-Addon-(Beta)-A-liquid-fluid-simulation-tool-for-Blender
Wow! That's absolutely stunning! Then again, I fear to ask how long would it take to render an animation like this. :)
Blender has become downright mind-blowing over the years. I'm also curious as to how fast the rendering would be (I noticed the fluid simulation is capable of utilizing GPU's so it might render faster than you think).
I have not been able to find information about render times, but they have yet to start beta testing. I am going to keep a close eye on this because a good fluid simulator in this price range is already a reason to learn Blender.