Please help...what is wrong with my collision ?

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Hi Folks,

I´ve created a cube, cut the top surface to create a open tank, extrude the sides and the bottom and placed a flip tank inside.
No I will let fall a cube in it, but it´s collide on the top of the tank as if it is still a closed cube.

Whats the fault ?

Kind regards

Cyber-Steve
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Attachments:
Splash Tank.hiplc (2.1 MB)

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Try checking “Output Back” on the polyextrude node. Fluids can't collide with a paper thin face. Fluids and gas require an actual volume to intersect with.
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Hi Enivob,

“Output Back” doesn´t help. The Problem is, thats the falling cube collide, not does it not do, but its collide on a
not existing top (as if the tank is a full cube and the blast and extrude nodes would be ignored).
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Change your Solver from Bullet to RBD. Bullet uses Convex shapes, so even though you cut out a side of your container, Bullet considers it a solid cube. RBD interprets it correctly.

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Screen Shot 2019-09-13 at 9.49.54 AM.png (1.8 MB)

>>Kays
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Hi Midphase,

that´s it

Thanks so much for your help.

Cyber-Steve
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