Granis collision help

[PortalPyro98]

Started trying to make a Hour Glass effect but when i press play the grains appear on the outside of the geo, not sure what the problem is any ideas?

HourglassSim.hipnc

[kfu]

Try giving your collision geo some thickness and inside dop, display your collision representation to see if the collision is correct.

[PortalPyro98]

29 minutes ago, kfu said:

Try giving your collision geo some thickness and inside dop, display your collision representation to see if the collision is correct.

Ok i'll give this a shot and report back

[PortalPyro98]

2 hours ago, kfu said:

Try giving your collision geo some thickness and inside dop, display your collision representation to see if the collision is correct.

1 hour ago, PortalPyro98 said:

Ok i'll give this a shot and report back

 

Ok, I've given the geo some depth which solves the problem of the grains just appearing outside of the geo when the sim is played but as soon as the grains hit the middle part of the hourglass the grains still don't collide with anything, any ideas?

Also, I looked at the collision geo and concave looks good but convex looks more like a tube but will not change shape if I increase the detail.

HourglassSim.hipnc

Edited December 10, 2018 by PortalPyro98

[kfu]

Just use vdb volume as collision source, in my case it worked perfectly.

Convex is like that, it's trying to calculate collision geo as no dent or no low ground. In you case, you can't get prefect collision shape using convex by increase geo detail.

 

 

HourglassSim.hipnc