Hello, it's possible export .mdd with houdini apprentice HD?
i don't understand english well and i'm not sure..

thanks

Yes, it is. In the /out network, do Tab > MDD Point Cache …

humm very well.. thanks…

but where is “out network”??

i don't found

i'm new user.. sorry

Excuse the bad graphics ….

ouaww
i'm happy, thanks a lot

but…
always a but with me… sorry

when i import mdd file into modo, nothing happens..
i search i search..

an idea?

thanks a lot for your help

I don't know modo but you usually need to have some base geometry to apply the point cache to.

Did you try loading in the geometry first then apply the point cache to that? Maya, C4D and others work that way…


-jeff

i have try with maya, and it's ok…
with houdini, nothing, i import my mdd file into my geometrie and nothing…
maybe i use not just houdini..

first i import my geometrie from modo into houdini
then, i anim my object..
i use my mdd point cache
In SOP, i choose my object
then i clic on “render”
it's just?

thanks

Did you set up a frame range on the MDD Point Cache ROP?

ok… its perfect… it's that..

youhouuhouu

thanks a lot all…. thanks thanks

Hi there..Im picking up this thread again, having similar problems.

here´s what Im trying to do..I have a simple sphere made in to a fluid object and I try to mdd export it to lightwave..I follow this thread and it seemed to go well until I load the mdd file in the mdplug in lightwave, nothing happens and I believe that´s because the rop network node is needed right? this wasn´t mentioned here but in the example files it was there and it also exported well into lightwave.

My confusion is about where to add the ropnet..should it be added in the fluid object, and then the mdd cache node where do I put that now if it´s supposed to be connected to the rop network somehow?

pretty new at houdini aswell.

Michael

hello michael,
for my problem,
I passed by an export Maya, and then Maya to modo .. this is not the ideal solution but the only thing I found .. sorry

if you found a solution, I would be happy that know..

thanks

Aurélien

MDD files are point cache files that need to be applied to the geometry. Furthermore, point counts cannot change. There's no workaround for that because that's the MDD format itself.

Anyhow, I created a vid of how to export it in Houdini for those still interested:
http://www.screencast.com/t/UhbLE46E [screencast.com]

thanks edward, I did export a similar example from help files, a different setup with a rop network and it worked okey in lightwave,
and I did exactly what you are showing in the video and that works alright to export in lightwave too..

but doing this with a fluid object isn´t that simple it seems and Im not sure I am exporting at the right obj level, I have tried different levels thou.

here´s some images showing where I export from..in this case it´s in the end of the fluid obj called dopimport, perhaps I should export from the fluid obj1? see export at this level image.

the object is exported well to lightwave thou and no change to point order,I am keeping it as the obj format.

the next question is if I am setting the sop path to the right obj too?
in this case I am choosing th dopimport obj aswell. see mdd output image

For a fluid, the point count will always change so the MDD ROP method wouldn't work. If you still want to try, you should select the deletebbox SOP.

Cheers!
steven

stevenong
For a fluid, the point count will always change so the MDD ROP method wouldn't work. If you still want to try, you should select the deletebbox SOP.

Cheers!
steven

select the deletebbox for what? export of geometry or the mdd export?
in any case Ive tried both..nothing of that works.

thanks anyway for trying to help, perhaps this aint doable with fluids?
Ill do a check on the newtek forums aswell.

Michael

Selecting the object will use the SOP inside which has the Display (blue) flag turned on. So in your case, it won't make a difference.

Regardless though, I'm pretty sure your simulation will have changing point counts as the frame changes so the MDD method won't work.

You will have you export a geometry sequence (eg. from the Geometry ROP) instead where it writes out a copy of the geometry per frame. As to how you load a sequence of geometry files into Lightwave, I don't know.

Thank´s edward…that cleared up my thoughts on this.
I was suspecting that it is the point count that changes so that it wouldn´t work.

hard fx works alright thou..cool.

have to try the obj sequence, there´s no problem regarding lightwave..the object sequencer is there and easy to load, have to check on how to export the sequence thou..Ive been receiving some hints on that here on the forums before..

Then I need to find motion blur plugin that is supposed to be somewhere.
Well someday I probably won´t bother going this ruit, depends on how fast I can get into the houdini workflow and also, how houdini develops in terms of it´s renderer(speed) and volumetric previews, so used to fast
render speed and previewing and setting up volumetrics in lightwave in a blast.

But on the other hand it has taken the newtek team so long time under development and the hardfx and particle power has been overseen for to long time, that´s why Ive been looking in tho houdini.

Michael

Edward,

Thanks for the advice on MDD export. Unfortunately, when following your instructions and the video, everything looks fine but the MDD file does not appear. Any idea why? Is this a mac 9.5.241 version problem?

MDD file does not appear where? Since you mentioned MDD export, I assume you mean some other application?

Thanks for your quick reply. I guess instead of “export” I meant “render”. It is the mdd file itself that is not created by Houdini.

But I have reached the conclusion that I need to do some remedial work in learning about Houdini and rigging.