Problems exporting displacement from zbrush
David Saber
I'm trying to export a displacement map from Zbrush 3.1 and I hope to
use it in XSI 6.5.
In Zbrush I worked on a *.OBJ of a character that was modelled in XSI
6.5 (with a UV setup).
I am following the instructions in the file
XSI_ZB_Displacement_Maps-2005-Nov-10.pdf
After the export from Zbrush, I get a tiff image that is almost all red,
with some slight variations of this red color. Also my UV setup is
visible as lighter shades of red.
But this map does not work at all in XSI as a displacement map.
Also I'd like to know if it normal that in XSI, in the texture editor,
when I switch "show overlaps" on, all my UV set is red colored (on the
same character).
Thanks for any help,
David
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Mikko Ronkainen
That is so outdated tutorial. Try 32 bit float quick code
DE-LCEC-EAEAEA-nRatioXSI, other steps more or less as in that tutorial.
There is also video tutorial at xsibase for 16bit (if I remember) disp map.
Regards,
Mikko
Jeff Sargeant
make sure all your channel ranges 1,2&3 are set to full range. I think 2
and 3 are off by default.
Jeff
David Saber
It works much better now. But I still have some questions:
- I didn't find the Xsi-Zbrush-displacement video tutorial on Xsibase's
tutorials section, do you have the link to this?
- In Zbrush I worked with subdivision level 5. When I export from
subdivision level 1 (as advised in this old pdf), the displacement map
is very dull, almost no variations of the shades of gray. But when I
export from subdivision level 3 it is much better. Shoudl I always try
to export from subdiv level 5?
Thanks
Mikko Ronkainen
On Fri, 09 Nov 2007 02:58:45 +0200, David Saber <dav...@neuf.fr> wrote:
> Thanks Jeff and Mikko.
>
> It works much better now. But I still have some questions:
>
> - I didn't find the Xsi-Zbrush-displacement video tutorial on Xsibase's
> tutorials section, do you have the link to this?
It is by JamesCG in "How I Did it"section.
http://www.xsibase.com/forum/index.php?board=6;action=display;threadid=31709
Take a look it really is easy easy for it.
> - In Zbrush I worked with subdivision level 5. When I export from
> subdivision level 1 (as advised in this old pdf), the displacement map
> is very dull, almost no variations of the shades of gray. But when I
> export from subdivision level 3 it is much better. Should I always try
> to export from subdiv level 5?
In Displacement Exporter 3 dialog, low right is preview window and slider
beneath to adjust the intensity. The Alpha Phase in Gregs tutorial isn't
really necessary any more, if I remember right. You just first create it
once in Multi Displcement3 and then adjust the intensity and create
again. When you adjust the slider quick code changes. Note that I left the
quick code in purpose slightly dim, not to burn it at first run, so if
you're in hurry you can leave the first and adjust if you have time. I
don't know if there really is such as "always setting". It must be
adjusted among how much displacement is taking place.
To get good crisp displace, one that also stands deformation isn't really
easy. I f there is a one path to follow I'm not aware of it. I believe for
six zb levels I need to have sd2-3 in XSI and 4K 32bit displace to be able
to deform it with bones or such. Not nice to render, therefore I displace
with 1K map and Normal map the rest.
I'll try to post some images to xsibase, a simple walk through. I'd
appreciate if some who does mapping constantly did it instead, I need to
check the steps and it may take some days before I'm in such shape to do
it. I mean such that someone could follow what I mean.
The alpha depth isn't really cast in iron, you may adjust it to fit.
Geometry Approximation -Displacement "Fine" and adjust as needed,
production series dvd's are helpful to understand those and available for
free. Discontinuity angle must be set accordingly among needs.
I really would like it to be easier.
Cheers,
Mikko