original velocity vector with retimer

[hkroeber]

Ok, I tried it and it's actually a lot easier than I thought. Here are the steps:

1) In your tyFlow, add a Mapping operator...set mode to mapping from velocity, specify a channel of your choice and set timing to continuous.
2) In your tyFlow, add a Mesh operator and turn off render-only
3) Retime your tyFlow however you want
4) Add a tyVertexVelocity modifier to your tyFlow and choosing velocity from UVWs and specify the channel you specified in the Mapping operator.

Now any frame you render, no matter how it's retimed, will have the moblur of the un-retimed original frame. NOTE: this method only accounts for linear motion, not angular motion, so it's not completely accurate....but that might not matter for your purposes.

Yeah.. thank you..
is the mapping information saved into an tycache too ?

Regards
H.Kroeber