View Full Version : Need HELP - Will PAY!
Ok guys ... here is the deal ...
I have been at this for two days straight and am missing something small I am sure, but I am up against a deadline and need help getting my models into Max for my VRay renders using displacement, normals, textures, etc.
I have some general questions about the workflow and am willing to pay for your time via phone conversation (can pay with Credit Card, PayPal or send a Check).
If you are seriously interested, speak understandable English and can host or receive a call in the US or Canada let me know and I will get in touch with contact info.
I am sure I can figure this out eventually since I used to use ZBrush for this very thing years ago, but I am rusty, technology has changed, up against a hard deadline and quite simply could use the help.
I estimate the call would take 15 - 30 minutes and I am happy to pay for the call and your time.
Can't help unfortunately, Maya kid.
But have been where you are and will keep
my fingers crossed for you.
Best of luck, don't give up.
Edit: not to cheat someone out of money but why don't you
outline the problem generally. Talented and generous people
hang out here.
Maybe one small suggestion will unravel the thread.
They will undoubably move your thread to the bottom anyway.
Ask there.
Or even wilder, ask support at Pixologic, if it pertains to Zbrush
and another program, they are also very helpful.
I have Maya on order since I am in the process of migrating back to Macintosh after 6 years of nightmares with windows ... but it will be months before I am up to speed and will likely always use Max since it was my foundation and I am comfortable with it.
I have built a basic max scene with my test model exported back out of ZBrush and will forward that to whoever gets in touch with me. Also will forward them the ZTool as well so they can walk me through the proper way to do the Displacement map for Max/VRay.
EricArtman
06-04-09, 06:16 PM
Hi hosch,
Can you post some more details about the issues you're having difficulty with?
Then we can tell how tough (advanced) of a problem it it.
Regards,
Eric
PS - Your post will likely be moved to the Questions @ Troubleshooting Forum
Zbrush displacement for max2008
screw this up, type the above into search.
Sure:
The main issue is that my tests using a basic noise map (pure black and white) from max works perfectly. Works with negative as well as positive displacement on the model, but when I export the displacement from ZBrush it is in grayscale and effects the entire model since Max uses black/white to displace. This may not sound like a big deal on a sphere, but on a detailed model such as the human heart with small veins sticking off of it it just does not work properly with my current settings at least.
http://forums.cgsociety.org/showthread.php?t=410879
Been though that one already - either I am a rock (entirely possible:) or it is just not working for me for some other reason.
Did you try and use the map as a tiff.
Forgot how to do this,but in Photoshop convert the black and white
image.
Maya used to have problems with displacement maps that
were not tiff.
Forget money in the title,invitation to a waste of time.
Every nut and his cousin will be there.
Try this,formulate the question and put it into troubleshooting.
Trust me, some of the greatest people in the business come here
and sooner or later have hit problems such as yours.
Call or email direct Pixologic.
I would bet next weeks check that you are not the first to
have this problem
EricArtman
06-04-09, 06:30 PM
Sorry I can't help hosch.
The only time I rendered displacement maps in Max it took so long to render I gave up.
I use ZBrush generated normal maps and a little higher resolution model rather than bother with displacement maps.
Exporting Displacement Maps To Max From Zbrush 3.1
copy and paste the above into search, it discusses file type.
You might be right - I have only done this one other time - about 4 years ago and got a student to call me that really knew his stuff and it paid off for us both.
I have my entire workflow down for this project other then the Displacement from ZB to 3ds/VRay.
I am a week behind because of computer issues and a bit desperate so willing to put up with a couple of wastes of time if I can weed through to get someone that really can walk me through the proper flow - should be a short call if they know their stuff /shrug.
Terribly sorry could not be of help......
Fingers crossed....
Wow that looked like a promising thread until I noticed that every single link to instructions or walk through posts were broken :(.
Could you post a screenshot with the result that you are getting so we can troubleshot the problem ?
In the vray displacement modifier try to put the Shift value of -(Amount/2) so you will get negative displacement
If they were there, someone besides you has/had the problem.
http://forums.cgsociety.org/showthread.php?t=410879
Ps. Know a little of what you are going through.
A few years ago I wanted to create displacement maps
in Maya.
For three long days and night worked my ass off, no good.
Got to be a compulsive thing, me vs it.
Begged on a thread for help, like a drowning man.
Then a great guy named Scott Spencer ( now world famous author:D )
helped me.
Was doing a lot wrong, not flipping image, not converting.
For months after did one every day so would not forget.
Now, no need to use, forgot again.....
Sure will do - I have tried pos and neg values and have had unsatisfactory results each time - still convinced it is <--- user error though, LoL.
Give me a few moments and it will be posted.
I've attached an example file on how to render the displacement in vray and what seetings to use in zbrush.
Hope it works.
just a basic image of the model in low poly form that I am importing to max - just a basic low poly heart
ok will give that a try - will post results.
I see differences already that I had not tried - testing will reply in a few.
Think I will get there with the two things I see different in your file:
* using cm as the unit was important
* using roughly 7 for my positive and -5 for my negative
tweaking settings and will post results in minute
The units shouldn't matter.
If you use 7 for the Amount, you should always use minus half of that for Shift. that's -3,5.
The Amount value is at your choice, the shift value should be calculated from that.
I was unable to get the 7/3.5 to work properly, but tweaked it some and got the result i am looking for that most closely matches the test ZBrush Tool.
I used 7 / -4.75 for my settings.
This obviously does not look like a real heart yet, but does match the test from ZBrush.
The only remaining issue now is that there are artifacts on the veins on the left/right sides. You can easily see them, but if you need me to circle them let me know.
I will try a bit more experimenting on the ZB side as I think the issue now resides there since the Max side is fairly set now.
I am using the D32 map that was generated from ZB - the R32 map does not do anything at all.
Try to use the 16 bit map with the settings that I have in the screenshot from zbrush. You should get the same result as in zbrush if you use the minus half Shift value with the 16 bit map.
My guess is that those artefacts are caused by the UV seams. Try to uncheck SmoothUV when you generate the displacement map, also check Keep Continuity in the vray displacement modifier
I am going to reset the UV's to AUV so there is no questions there to test it - I did not model this or set the default UV's - it is an asset provided by the company that contracted me for this medical animation so I really can start from scratch with the UV's since there are no textures yet that I am happy with.
Well, it looks like it is not going to work. Makes no sense that I would use the exact same map and get two different renders without changing a single setting - must be more corruption - will reboot my computer and then myself and start again /frustrated.
cresshead
06-05-09, 02:28 AM
i don't use vray but do use mentalray and have sorted out how to set up displacement rendering with 3dsmax and mental ray with max 2008
email me if you need to
cresshead AT yahoo.com
Post a separate thread here and/ or in troubleshooting.
In the title put Max, displacement map, vray.
cresshead
06-05-09, 10:00 AM
havn't got your email as yet...
still you maybe refering to someone else?
how i worked out displacements in max was from transfering info from this mudbox vid to zbrush.
http://www.mudboxhub.com/index.php?pageid=QuickStart%20(lot2)2
you can reach me at john at johndhosch . com since my email did not make it to you
I am having a number of issues from UV's to displacement, etc.
I give myself a couple more hours and then I am removing ZB from the pipeline on this project - I am now a week behind and 2 days until test renders are all due - just stills of each asset, but still I have not moved past testing to actual asset work yet
the mudbox > vray video did definitely help - exploring settings now and will post results in a few
Got in touch with someone I know at a local game studio and am headed to meet him for some help ... WOOOOOOTTTT!!!
cresshead
06-05-09, 01:14 PM
excellent, let us now how you get on and share your results
Thanks to a bit of help from the great people at Pixologic and the information on that mudbox > vray video I am back on track.
The settings on this displacement are not where they need to be, but at least I am close enough to start tweaking and then I can move on to the diffuse and other parts of this project.
Attached is the image of the heart at an unfinished state, but a solid test for the displacement. I used the heart because of the bronchial - if I can get it to work properly with something that tiny it will have no problem with the rests of the anatomy.
Thanks so much for all the help everyone!
Almost forgot to thank the guys at VRayMaterials.com for the nice test scene that I used. I like using that one for my base when testing.
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