Hey Guys,

i am working on a rocket trail without the use of pyro
based on the tutorial of Johnny Roek.

for those who dont know:
http://www.youtube.com/watch?v=Ed-sdDrePyo [youtube.com]

it uses copy node to copy volumes to a particle system.
in my test i used H13 and the instancer node to achieve
this effect, but it gets terrible slow in viewport when the
instances are active.

So can somebody confirm that this is the way to go to
get this effect or is it a nice but useless timeconsuming
way cause there are better ones ?

and if this is a good to go way - how can i get color based
on age and transparency control to the volume instances ?

…
cheerz
de Heavy

Did nobody made a rocket trail yet ??? … i cant belive it…
:shock:

lots of question but no file to check your work…. please upload what you have done already. thanks!

without being rude, but does this mean - no file no help ?

Yes a file will always help! No time to decipher the questions.

Please, take no offense, -heavy-, but there's usually a number of ways to do something in houdini. Few of us can spare the time to watch the tutorial you mentioned and would be helpful if instead of guessing how you got to your issue, we could look at your setup and be: AHA!

Cheers

ok i removed the unnecessary geo but cause everything comes from Maya animation you have to use the bgeo from here

http://www.zipl.de/rocket_bgeo/emitterGEO.rar [zipl.de]

to make it work.

the file node for the geo is in the “Rocket_ONE” node, but there
is no magic in it. only missing age to color and age to alpha.

So if one will take the few seconds to step throught the posted
video the one can answer the most important question which is
more a general question:

Is this the way to go when comes to shade and create rocket trails
without pyro?
i know there are a lot ways to create setups especially in H but when
it comes to shading there shouldnt be that much various workflows.

and yeah, hell yeah i dont take it as offense, but it seems that there
have been a bad habit over the last years - look the file, change
something so it works, tell the author “do it better that way” and
explain later if he asks - as Marty said “No time to decipher the
questions.” - but do people learn stuff that way ? without knowing why
things happen ? i dont think so… but i understand that time is short and
one do it that others the other way. so enough of that know.
back to topic.


cheerz and thx for help i appreciate that
de -heavy-

Thanks Heavy - I'll take a look.

I'm not sure what to say about forum help- you get what you pay for? If you need better help you can pay for it… I use it all the time for production issues and the support team is very helpful!

Check it out:
http://www.sidefx.com/index.php?option=com_content&task=view&id=1429&Itemid=321 [sidefx.com]

hey Marty, did you find time to take a look ?

or can smbdy else help to inform me about a rocket trail shading workflow ?

cheerz
de -HEAVY-

Hey Heavy - sorry not yet- I got up to looking into the slow viewport issue with many instances.

How'd you go with it, where did you get to?

Have a look at this and see if it helps:
http://www.sidefx.com/docs/houdini13.0/copy/varying [sidefx.com]

Also search Odforce forums for tips too. http://odforce.net/ [odforce.net]