paint splat

[Guest]

Hello,

I have been messing around the Phoenix recently trying to create a paint splat. However all I can seem to create is heavy clumps of paint like this: http://img27.imageshack.us/img27/2618/paintsplash.jpg

I am looking to create a nice thin splat such as this: http://b.vimeocdn.com/ts/147/440/147440668_640.jpg. But with extra splashes as the paint hits the surface.

I have started with the paint sample scene that ships with Phoenix and messed around with the discharge to make it more of a splat rather than a pour and then changed the surface level to make it thinner however its still pretty thick and it doesn't splash as I had hoped even after playing with the splash parameters. I also tried messing with the sticky parameter but again it lead me down a frustrating path.

What settings should I be looking at?

Thanks,

[Ivaylo Katev]

i think the wetting option can be helpful here. but you will need a higher resolution than in the paints scene, and perhaps the viscosity have to be zeroed as well.

[Guest]

Hi,

Thanks for the reply. I have turned on wetting as well as having the viscosity at 0. I have also tried this at 0.1. It gives pretty much the same results. How would I go about increasing the resolution, which setting is that?

[Ivaylo Katev]

the wetting has an additional option - drying time, set it to a big value (it is in seconds).
the resolution is controlled by the grid panel, just use the increase resolution button. for good results you need at least 5-10M cells, the very professional simulations reach up to 1000 M cells.
of course the bigger resolution slows down the simulation.

edit: there is one more option that may be important for you. the paint scene uses "strong surface mode" with sharpness 0. this guarantees good surface quality, but decreases the droplet quantity, try with disabled string surface mode and sharpness 0.5

[Guest]

Thanks again. 5 - 10 million cells? Might have to upgrade my PC to handle that

[Ivaylo Katev]

for an ordinary PC it takes about 1-3 min per frame, depending on the dynamics.

[Guest]

Thanks for the suggestions it seems to have a worked. One setting I didn't quite understand is the drying time. Due to limited hardware I couldn't test it out as much as I had hoped. I just set it to something like 30 (seconds) and it did the trick. Not sure what effect that had over say only having 1 or 3 seconds though?

[Ivaylo Katev]

if it was 3 seconds the wet spots will disappear after this time