C4d and VDB

#2

This thread will be a brain dump to help me record and better remember. And perhaps useful to anyone playing along.

First off…the primary difference between ‘Signed Distance Field’ and ‘Fog’ is that SDF is only generating the exterior shell. ‘Fog’ on the other hand creates volume data.

This video is a great overview of Volumes…and at 23:50 the speaker explains the differences.

https://www.cineversity.com/vidplaytut/siggraph_2018_rewind_matthaus_niedoba_behind_the_voxels_bringing_volumes

#3

R20 introduced “Volume Loader”.

Operation is straight-forward. Here is the help description:

The Volume Loader is used to load Volume sequences. Volume sequences are animated OpenVDB Volumes and consist of numerous individual and sequentially numbered *.vdb files. If such a file is loaded, the Volume Import will open automatically. In Cinema 4D, Volume sequences are arranged in the Volume Loader object. As soon as you click on Play in Cinema 4D, the individual files will be streamed from the respective storage device/location. The scene file itself will barely increase when the Volume Loader is implemented. When the scene is passed on to other users you have to make sure that the individual files are also included - as the case is with textures or sound files, for example.

The Volume Loader object can be made a Child object of the Volume Mesher in order to generate a polygon object. If the Volume Loader object is made editable, it will be converted to a single non-animated Volume object in its current state.

#4

You would never know it, but TurbulenceFD comes with it’s own little converter program to convert it’s native cache files to VDB.

Video:

#5

So why is this cool?

Volume Loader gives us a fog volume…and fog volumes can be used with FIELDS and many other parts of c4d.

#6

Octane meanwhile can generate a VDB from c4d noises. I’ll be eager to try this out today. I’ll be curious if this can output animated noise sequences.

#7

Speaking of c4d’s noise and Fog Volumes.

The mere addition of a random field (even alone) inside a Volume Builder can be used to create or subtract noise shapes.

#8

just in case you missed it, I have a few videos explaining what SDFs and Fog Volumes are…
https://www.cineversity.com/vidplaylist/new_in_cinema_4d_r20_volumetric_workflow/

#9

I use fog volumes quite often to do clouds and rolling ground fog

#10

Had some fun last night with Turbul.FD derived VDB…fed into mograph setup. Lots of possibilities.

#11

screenshot request! :slight_smile:

#12

Sure thing. I’ll post a screen grab or little video tonight or tomorrow. I want to work with a better sim than I was testing with last night.

This is the setup I had last night. It’s similar to the Maxon guy’s tutorial linked above. I’m just using a Cloner instead of a Matrix, and have a couple extra Effectors.
TFD_mograph

TFD_mograph3
TFD_mograph3.PNG800x866 123 KB

#13

Thanks willl look forward to the video, do you have the time that M. Niedoba project starts?

Btw do not forget the Andrew Brown NAB 2019 volumes i posted while ago.

#14

We use VDBs for smoke/clouds and such. Load in redshift and Arnold for quick rendering.

#15

Forum posting was buggy when I tried today. I’ll get something up this weekend or sooner.

#16

Bullit2–You might be referring to Thomas Brown of Vessel? (Though his examples were about generatig geo–not vdb smoke/cloud/fog)

#17

Correct, he does VDB geometry in that

#18

Yes I previously watched Thomas’s presentation and was super impressed.

As Joel suggests, this thread is more about using the Volumes in Cloud mode…and in the interplay of VDB between different programs and plugins.

#19

Ok wasn’t aware of that.

#20

What’s the status on this? Anyway to use real flow for c4d to make VDBs for real flow all within C4D?

#21

I meant to say: C4D Realflow to VDB to Octane? Is all in C4D possible to make a VDB to send to octane? etc

Thanks!!!\\\\\