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Artisan-Hawks
06-15-2005, 04:18 PM
I am working on a scene in Maya that requires a river flowing through a rocky bed. Simulat to the one that was created in Ice Age (the scene where the indian women dies) Currently I cant seem to find a realistic solution that doesnt take tons of memory! Any one know a good solution?
efxdoc
06-15-2005, 04:28 PM
http://www.nextlimit.com/realflow/index.html

You can download a free working copy of RealFlow from Next Limit (yes, you can save!). I haven't looked at the user tutorials lately but there might be something there to help you out.
Artisan-Hawks
06-15-2005, 04:41 PM
I tried realflow and was impressed, but when I imported the river into Maya I had alot of problems with memory usage, it was a resource hog! Maybe i am not doing it right. should I try and keep it in realflow?
FrozenSun
06-16-2005, 01:42 AM
Well depending on what version you have you can use fluids. I use 6.0 Unlimited and i don't seem to get memory issues. But Realflow seems to be what many would use, and i do believe they have resolved or improved the issue of memory in the latest release.
Kabab
06-16-2005, 01:51 AM
There is a great method for doing this with fuilds pretty fast as well...

Check out the lastest Alias fuilds DVD it has a very good example of this.
efxdoc
06-16-2005, 02:51 AM
I haven't tried this (so watch me put my foot into my mouth) but have you thought of animating a texture? Build a shader network with a bump map and a ramp or fractal for the water surface. The attached link is to HighEnd 3D's Maya shaders (there's a rocky, mountainous-type shader found near the top of the page you could use for the river bed)

http://www.highend3d.com/maya/shaders/?group=mayashaders&section=&minl=200&maxl=50&numi=298&sort=file_name

There might even be an animated water texture there, for all I know...
Artisan-Hawks
06-18-2005, 12:26 AM
Great suggestions, but the effect I need is to have the water look like class 5 rapids! with tons of caos in one part and too smooth out to deep water. I can achieve the deep water part but the caos causes caos with how many particle it has to track. Maybe there is a way with 2d simulations????
Bonedaddy
06-18-2005, 12:42 AM
It's a tough problem. Cause I think stuff like fluids and realflow gets hectic and wonky, I'd be leaning towards using cheats. An animated noise map, which has its place2d node move forward as fast as you want the river to be flowing. This noise map can affect the bump, a lattice, deformations, whatever looks good.

Figure out particle expressions based on that (or maybe incidence angle from samplerInfo nodes) to spawn wake particles at desired points.

Hope for the best! :)
Artisan-Hawks
06-18-2005, 01:14 AM
You know what I think you might be on to something!!! What if you had a 2D fluid container move through the scene colliding with the river bed. That may work, I'll give it a try
Kabab
06-18-2005, 03:07 AM
Get the fuilds DVD there is a really nice method they use with the spring solver(really fast) which gives you nice collisions with objects in the water....
Artisan-Hawks
06-18-2005, 10:13 PM
Get the fuilds DVD there is a really nice method they use with the spring solver(really fast) which gives you nice collisions with objects in the water....

This sounds good can you give me a link?

By the way tell me what you think about my first post, here is the link...
http://www.cgtalk.com/showthread.php?t=250807

Thanks,

Topher
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06-18-2005, 10:13 PM
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