billowy smoke - geometry velocity blur

[jumper]

Hi,

I have used the pyro shelf tools to create train smoke. I have cached the sim to disk with velocity - ie vel.x vel.y and vel.z.I am rendering the smoke with the "Gemometry Velocity Blur" attribute on (its on the geometry node). I like the sim but want to mult down the geometry velocity blur .... I guess I need to mult down the vel.x, vel,y, and vel.z but I am not sure how to do this on the cached bgeo sequence - I looked at volume mix sop and the volume vop .... but I am not sure how to mult JUST the velocity. Any help will be much appreciated!

Thanks

Stephen

[pclaes]

you can do that with a volume vop.

Basically name your parameter the same name as your field.

parameter -> vel (vector)

then multiply it with your own float parameter (name it v_mult or something similar). then create another parameter, but set it to export and name it vel (also a vector).

I would also highly recommend you to watch this (at least the first 15 mins.):

http://www.sidefx.com/index.php?option=com_content&task=view&id=2200&Itemid=132

cheers,

Peter

[jumper]

Hey Peter,

Thanks for the help! Works great. I also managed to group the vel using 1 2 3 as primitive numbers and then volume mix on that worked too. Your way is a bit more flexible! The link is very useful too .... I somehow missed that.

Cheers!

S

[digitalaayush]

Hi Jumper,

Would you like to share the procedure to achieve the train smoke simulation with all of us. Your effect is looking pretty awesome in the thumbnail already..!!

Cheers

Aayush