Better grid adaptivnes

[larex39]

Hi Ivaylo, will be possible in next releases to have grid adaptivness similar like nayad have. Because now in phoenix the adaptivnes do only bounding box of for example temperature, but the boundig box have too much not used cells than the simulation with realy small cells start to be also uneficient. The naiad adaptivnes is doing it with cells, not with bounding box of whole simulation, and the simulation area is not box but the similar shape like your fluid has. Thats why naiad is realy fast.

[Ivaylo Katev]

naiad is not grid based, it is particle simulator, and has no simulation area limits.

[larex39]

Reay not, realflow was only particle based now has hybrido, naiad is pure grid pased

REVOLUTIONARY 3D GRID TECHNOLOGY. Naiad's volumetric 3D tiling technology allows the system to solve massive simulations while using a very low memory footprint, since Naiad adaptively tracks the fluid and only creates "fluid tiles" in regions where the fluid is. This frees the artist from having to manually manage an axis-aligned rectangular "fluid domain". The tiles can cover completely disconnected and irregular fluid structures without any problems.

[Paul Oblomov]

Yeah that would be super-nice. Houdini already has multiple resolution domains.

[möbius]

Recently i saw a video on youtube where a voxel grid is used to calculate realtime Global Illumination, see the video here: http://www.youtube.com/watch?feature...&v=fAsg_xNzhcQ
The Part i'm talking about starts at around minute 3:40 with the adative grid resolution. Immediately i thought about Phoenix, because for example in terms of smoke you need a higher resolution at the emitting object and a lower one further away.
Shouldn't it be possible to have an adaptive resolution in Phoenix?

[izotripp]

+1 this is probably the feature I'd like the most to have.

[3dwolf]

a little off topic but might be a simple addition to the current adaptive grid:

Some additional cells around threshold value.

e.g.
Adaptive grid: Smoke
Threshold 0.02
Sim starts, smoke grows, after a while smoke with a density of 0.02 comes close to the boundary of the grid. Even before the theshold reaches the boundary it would adapt and grow so that there is more room for some nice turbulences and sim and stuff.

At the moment the simulation becomes pretty flatt close to the boundary as there is no stuff going on around or the grid might become huge if you set the threshold too low and everything diffuses all over the place. I would like to set the threshold to the render-cutoff-value and set the minimal grid-room around the visible smoke/temperature/whatever.

err. I hope that is somewhat understandable.

[ivaylo.ivanov]

This is already in the Maya nightlies, only the UI is missing in 3ds Max

[3dwolf]

oh, great