Fluid container expanding in opposite direction

#1

Hi all!

First of all, I’m a noob in this world, so I hope I’m not making a stupid beginner’s mistake :wink:

I’m trying to make a little scene in which i set up some smoke effects with maya fluids. An emitter attached to a moving object ejects smoke in a direction (more or less to the upper right corner) and the smoke is carried further to the right via a volume field. However, the container expands not only in that direction, following the smoke, but it expands to the left and down as well. I guess this contributes to the (quite) long animation time and I hope solving this will make this scene easier to handle for me and my laptop.

I’ve added a screen of the raw scene. A couple of things to note: a second emitter and puff of smoke are visible, but it has its own container. Second, the emitter I’m talking about is at the current frame actually outside the container, but it’s not emitting smoke for a while at this frame. The emitter used to be attached to the “bump” just below the arrow of the volume field in the middle of the screen.

Does anyone know a solution to this? I can imagine more info is needed. Just say so and I will provide it. Help would be greatly appreciated!

#2

The auto resize increases and decreases the container depending on the density. If the density is above the theshold in the auto resize settings, the container increases, if it is lower, it decreases. It is increasing in your case, so I suppose there is some density, but you do not see it. That’s often the case if you modified the opacity in the shading attributes of the container. For testing you can increase the opacity settings and check where you can see some density.
You can try to increase density dissipation to make the smoke disappear faster.

#3

This is kinda of a dirt trick but you can add an emitter and set it do a negative value. place it where you want to kill density in the container and that should kill it.