Sorry, maybe my question is pretty stupid, I´m saving a document in zbrush, that include an objet with a material, I´ve saved the material, the objet, and the document. And when I open the the file again the material which apper is the default one from zbrush(red), not my material, which appear in the material thumbnail, but not assigned to my objet.
Could someone what I´m doing wrong?
Thankx!
Hey there,
if you want your material to stick with the model, you need to actually fill your model with the selected material. Select the Material (and the subtool) click on “M” for Material, go to Top menu Color and click on Fill Object. The next time you load up that model, it will show the material you saved it with.
Hope that helps.
Thank you very much dsoellbuster, i was not hitting the “m”, I was doing the fillobjet with the rgb.
By the way 
another thing I think it dosn´t working, but maybe there is a solution, when I save the document, and it has some textures loaded because I´ve been working with those, I have the seame problem, when I start zbrush again it dosn´t appear in the texture thumbnail…would be a solution?
I had this problem a while back. you will need to save your mats in your ZStartup folder in materials folder (Program Files\Pixologic\ZBrush3\ZStartup\Materials).
Yes!!! You are right DustyDeWD, recently tested, I can´t believe, it´s pretty uncomfortable, isn´t it? I´d like to save the material in my personal project folder.
thank you very much, if I find a way to do it I´ll post it.
Yes, its an annoying minor bug, what ZBrush actually remember about your material is the “placement” on the materials list, not by the name…so if you’re using a material not in the default start up materials list, Z will replace the material with the one on the default list that occupy the last material that you use.
Just for example, if you have a red wax material on the top left in you’re material list, then for some reason you open another materials (which not in the default start up position) and it will replace the red wax materials…even though you M fill the objects, whenever you close and open that file, ZBrush will assign the red wax to your objects, again its just simply Z didn’t remember the materials by name, instead by position in the list.
Probably it also happen with texture, I’m not sure.
_Revel
It is not a bug ,Materials use a slotted numerical system. do a search for more info if needed.
Woops, yes I guess “bug” is not a correct term…its more of how ZBrush assign a material to your object, its by the the material’s position in the list -or like what spaceboy412 said- slotted numerical system…but its gonna be more convenient to work if ZBrush can link to external materials file, so that it shouldn’t have to be in the default start up list all the time, but still can call it up if the project requires it to.
_Revel
Yes guys, I don´t complain about the system of Zbrush saving by slots number, I just don´t understand why I have to save the material inside the Zbrush folder to remember the textures I´ve have imported in the texture panel and work with.
I have a similar doubt with the lightbox, I can´t go outside from the program files, and is impossible to make a path to your own folder. 
Hope in the next version it come fixed, I think it´s a detail but it should be noted.
Maybe there is a script to fix it.
you might want to check out this cool plugin:
http://www.zbrushcentral.com/showthread.php?t=64809
also about Lightbox, create shortcuts for whatever folders you want to use and put them in one of the zbrush folders for easy access.
one way if you don’t want to use that plugin to have all your textures is to apply them to polyplanes and have those as subtools, you can then always clone the texture off them back into the texture palette, although all this will effect your file size.
Thank you very much spaceboy412, it seams to be cool the plug in. I´ll try when I´m at home.
Did you test it?
To save a custom material with a document simply make sure there is some of the material as pixols on the canvas. For example you might want to save a different default material:
Next time you load the document the custom material will become the default material. The same goes for any other material slots. If you have a model with several custom materials:
1.‘Drop’ the model to the canvas by turning off Edit and save the document.
2. Next session open the document and load the model.
3. Clear the background by pressing Ctrl+N.
4. Draw the model on the canvas and enter Edit mode (hit T on the keyboard).
And again … Marcus the great blows us all away 
Thanks a lot as always!
Hey spaceboy412, thank you very much for the link and the suggestions (http://www.zbrushcentral.com/showthread.php?t=64809), it works perfectly. I could test it just now, before I was done like you said, putting the shortcuts inside zbrush.
Thank you marcus_civis too, for the detail explanation, but I´d add that after you tweak a material and you got what you want, you have to save the material, and in a next session the doument wil call the material to put it in the slot it belong, isn´t it?
I´m a newbie, maybe I´m wrong.
Thanks all you guys!!!
No, you don’t need to save the modified material separately, just make sure some is painted on the canvas and save the document.
I think that just saving the document is enough, beacuse it leave the canvas painted with the tool, or not? 
I´ll test.
The document saves pixols which are pixels with depth information, it doesn’t save the 3D model but a 2.5D version of it. So you must also save your 3D model separately as a ZTool through the Tool menu to make sure that you can continue to edit it in another session.
Of course, sorry I didn´t say this part. Thank you very much marcus_civis.