velocity output for people that CAN'T use rpf's

[andrewjohn81]

The help file doesn't Seem to say anything about how to actually get many of the G-buffer options.

I selected the Object velocity option, enabled frame buffer.
I even tried turning on Motion Blur (someone said in one of the threads that velocity only worked if motion blur was on), although that would defeat the purpose, to see if that worked.

I always get the same results. It saves no file, and it is Black in the VrayFB.

Is no one else having this problem? I feel insane here.

After Effects comes with a free plugin called CC Vector Blur. I want to test it out to see if it'll give me something similar to RSMB. I'll put in a request for that software, but it sure would be nice to not have to deal with that. People can be real stingy first quarter.

[mike.edel]

found some information here:
http://www.revisionfx.com/generalfaqsMV3DSMax.htm

seems there is a free MR shader for max6, but it doesnt work in later versions
for max7 this tip might help you to get motion vectors without resorting to combustion to split the rpf files
http://www.revisionfx.com/generalfaqsMV3DSMax7.htm

there also is a script that splits rpf files into seperate channels - its written by bobo and can be found on scriptspot (its called channel extractor and still works even though its written for max3)
link: http://www.scriptspot.com/bobo/mxs3/...xtractor_02.ms
description:
http://www.scriptspot.com/start.asp?p=download&ID=267

cu mike

[vance3d]

If you go to the support.discreet forum for 3dsmax and search for velocity in the maxscript conference I think you will find a script that converts the vector information into an rgb image that can be used by RSMB.

V Miller

[Morbid Angel]

unfortinantly its not as simple as just turning on velocity. This is due to velocity working with some other gbuffers;
to get correct velosity for rpf you need to enable the folowing:

velocity, render id, node id, coverege, subpixel weight. Then enabling correspondant gbuffers in rpf's output will produce the correct motion information within rpf. You do not need motion blur turned on to get this effect.

[vance3d]

the script I mentioned doesn't require all those channels. in fact it will save the vector info as rgb for rsmb even as a tga sequence. I think the velocity vectors are generated whether you save them in a rpf or not.

V Miller

[mike.edel]

the script I mentioned doesn't require all those channels. in fact it will save the vector info as rgb for rsmb even as a tga sequence. I think the velocity vectors are generated whether you save them in a rpf or not.

V Miller

i guess the script wont work with vray displaced geometry tho'
after all the displacement gets done at rendertime

[vance3d]

well the script does a final pass after the render is complete so I would imagine that it would take it into account although I've never tried it.

V Miller