Cascade Simulator impossible

[elyptic]

In my scene I have created two liquid sims, one positioned above the other on the Z axis. There is a small overlap for the top one (PhoenixFDLiquid002) to 'fall' into the lower one (PhoenixFDLiquid001). In the overlap is a geometric cutout in the ceiling that I want the water flowing through into the lower chamber.

Before reading the docs thoroughly enough, I assigned a Cascade Simulator to the top one and targeted the lower sim (thinking you go from source to target). After reading the docs again I realized you need to assign from target to source, so I disabled the Cascade Simulator on 002 via the checkbox, but found I couldn't change the button to 'None'. Whatever, I thought, I'll do the simulation on the top and then assign it properly after.

When the sim was done, I selected the bottom sim (001) and clicked the Cascade Simulator, then tried to target the 002 sim. It says 'Can't Make A Circular Reference' and refuses to do it. I can't right click on the button from 002 to select 'None', it is stuck on referencing 001 even though the checkbox is clear. I can't drag the None from the button above it either, it's just stuck there forever. Reloaded the scene, same deal.

Maybe there is some maxscript I can run to clear the value there?

[Svetlin.Nikolov]

Ah, yes, this is one of the lovely things in Max - for some reason you are able to clear a button selector for a texture, but if the button would point to another node in the scene, then it has no 'clear' option. The MXS name for the control is 'cascade'...

[Svetlin.Nikolov]

I guess the easiest way would be to create a dummy liquid simulator, point the cascade you need to get cleared to the dummy sim and then delete the dummy sim...

[elyptic]

That probably would have worked, however I just bit the bullet and recreated the sim again. The hours spent resimulating would probably add up to the amount of time I spent trying to fix the problem, so I cut my losses.

[Svetlin.Nikolov]

Dang, sorry about that. Together with all node selectors we usually put a checkbox in order to workaround the missing Clear functionality, but a circular reference can't be worked around that way. I guess we should make our own custom control for that in order to get rid of this limitation...