My personal notes on Maya Fluid

Hi I’m Morteza Ahmadi

Today I start thinking about what Fluids Attributes Will  do?!

So 21/sebtember/2010 :

1.Solver Quality

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I start looking at Fluid’s attributes (and what is this ?!! : FluidSolverQuality!?)

 FluidSolverQuality: i change it from 0-1000 and i didn’t see any serious change after value:50 its just slowing down playback speed, and another thing is increasing the number will speed up simulation: It reach Top At:

Quality: 1—-Frame:55                Quality: 10—-Frame:51               Quality: 20—-Frame:49               Quality: 1000—-Frame:49

I think its better to leave it at Default Value it has both quality and performance.

2.HighdetailSolver

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This one is really important, See image below and some Video From “FluidHDS”.

I think its better to use :  off: any soft effect |  all except Velocity: For tin and soft smokes that has some cool swirl and details, i am mostly using this one as it has good detail and also a cleaner look compare to “All” | only velocity: i don’t know never find it useful for anything | all: explosions or  very detailed and noisy smoke

A Day has passed- yesterday i create a Cool But a very hot Sun. i save the file on C: Drive and because of a viruses i reinstall windows,end of the story, i don’t have the file anymore and i try to recreate it but it just doesn’t look that good

So i want to Try Attributes to see why i can’t achieve that look and quality anymore

3.SubSteps

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i can say nothing about this attribute, Maya help says: “Specifies the number of times the solver performs calculations per frame. Substeps are useful for improving the stability and simulation results of fast-moving fluids, fluids with high density grids, and when the High Detail Solve is used”

then i guess its better to test it on some fast Fluids, take a look at the image below

Some more tests with solver quality and Substep

4.Forward Advection

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i think its another way for solving, base on your simulation it some times add more detail and some times reduced it,

it will look cool for fire

so i recreated the sun, and i learn that some times you just need to look at your work from different angle

6.Size of the Fluid

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let see what will happen if i resize the Fluid’s container.

with the autoresize = on

well. noting happend !?

7.Emitter size & Fluid Resolution

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well. it change many things but  I find out that maybe it only changes the resolution. look at the image below “Image 7_1” notice the #4, the auto resize doesn’t work well

that usually happened at high Fluid resolution values, Look at the image “Image 7_2” there is no change in the size of the emitter i only change the resolution value.

notice that the value of 600 & 800 are like #4 of the “image7_1” its really bad if there were no way for using auto resize with high Resolution Fluids. How can i Fix it ?

Thank god, i learned the answer of this Question, earlier today, maybe there be another ways But Mine is using a low density Emitter. look at the image “image7_3”.

Low density Emitter:(a normal Volume emitter, Density Metod = Replace, Density/Voxel/Sec = 0.001, ) i Find out another thing if you set the fluid drop off to 0 it will kill the Fluid’s density and if you set it to higher values then you can use it to lower the density at that point or just as a way to resize the fluid container.

Note: the depth of the emitter is important too (Z Axis).

SoUp Upress parameters