Hole :)

[newbie47]

Is there any way I can make a see through hole in an object? Some boolean functions in Zbrush :qu:

[Frenchy Pilou]

Hello new
Welcome aboard !
No real Bollean function but
Many ways for your hole :)
With a primitive like Cylinder 3D on modify the parameter on the Sub menu
You obtain many sorts of volumes with Holes
(tip if you take 4 sides you can obtain all sort of quadrangular boxes :)
In apply a transparente texture on a volume
the more funny : drawing with the key "Alt" pressed = drawing with hole on any thing on the canvas :)
etc...
Pilou
Ps
You have a nice tut here :) (http://www.renderosity.com/homepage.ez?Who=Frenchy%5FPilou&ViewArticle=2675)

[andreseloy]

Hi Newby47 Welcome¡¡¡ Im glad to meet you¡¡
Im not sure if I interpreted in right way your need. Im sending two images and minitut. I hope this help you and please let me know if it function to you

Thanks for your attention http://www2.zbrushcentral.com/uploaded_from_zbc/200309/user_image-1062595831wdj.gif
http://www2.zbrushcentral.com/uploaded_from_zbc/200309/user_image-1062595848oqw.gif
Newby47.zip (http://www2.zbrushcentral.com/uploaded_from_zbc/200310/user_file-1062596048cpc.zip)
Newby 47 A.zip (http://www2.zbrushcentral.com/uploaded_from_zbc/200310/user_file-1062596072pfg.zip)

Thanks for your attention
ps: the other way,could be: eraser tool+dragrect+alpha 14.
http://www2.zbrushcentral.com/uploaded_from_zbc/200309/user_image-1062600757gma.gif
help hole.zip (http://www2.zbrushcentral.com/uploaded_from_zbc/200310/user_file-1062600780hzh.zip)

[newbie47]

I want to make a hole not in a cube in a modeled sphere. I take a sphere and I modeled like a spaceship and then I want to make a hole through it. How? Is it possible? :(
Ps:this post is for Frenchy Pilou, as for the andreseloy post i'm going to see how it works.

[newbie47]

Your method is good to make'it seem like there is a hole in there. I want to make a hole and then still edit the object. I tried using multimarkers but when i look at the sphere in "front view" it looks still round, and the other side of the xcut sphere messes up my other objects in that layer. I want to make a real hole in an object and then put objects in that space. Is that possible? :confused:

[The Namek]

I think you better model your hole from the beginning using a Zsphere model to start with ...

I'm not sure how to add holes and still remain edittable. What you could to is , import it to another program , use a boolean function , convert to an editable mesh and import again. ...

[aurick]

ZBrush does not currently have boolean functions for you to be able to make holes in a mesh while having the walls of those holes be solid.

With a polymesh object, you can delete polygons to make a hole, but it will simply be looking in.

There IS a way to accomplish what you want, but it's not easy:

http://www2.zbrushcentral.com/uploaded_from_zbc/200309/user_image-1062608108fwp.jpg

This is a mesh object. It was created by exporting the Sphere3D tool as an OBJ, thus converting it to a polymesh. I then imported it again and deleted matched endcaps. The next step was to export a Cylinder3D and import it again, delete the ends, and then flip the normals so that they faced inward (I used Tool>Modifiers>Double to allow me to still see it, though). Now it was a matter of using Multiple Markers and a bit of careful alignment to make the cylinder fit perfectly within the sphere before making a composite mesh.

In theory, you can do this with anything. The catch is to make the wall object be a perfect match for the holes. In addition, the edges will not be welded. If you zoomed in closely to the seam, you would see that they are still two separate objects.

Why doesn't ZBrush have boolean functions? Well, you have to remember that ZBrush wasn't designed as a traditional modeler. Why reinvent the wheel? ZBrush was created as a 2.5D paint program. When painting 2.5D scenes, you don't normally need to create a mesh with a true hole in it -- it's far faster to simply "paint" the hole using a 3D object and ZCUT.

However, Boolean functions are certainly worth keeping in mind for when the Wish List is reactivated here at ZBC. :)

[newbie47]

Could there be any zscript that would add boolean functions to ZBrush?

[Frenchy Pilou]

Zbrush is a program "constructive" and Bolean functions are destructive (in option substraction) :)
So you must built your volume by add piece after piece and at the end make your polymeshes !
The apparrence of for exemple a sphere substract by a cylinder is just an apparence not a real 3D volume :)
And of course yet any script can make boolean operation because there is no actualy boolean function !
Hope this help
Pilou
PS It's not a big limitation if you see all works here :)

[Mahlikus The Black]

Unfortunately, zscripts do not add functionallity. They only work with what is currently available in application.
Thats another thing for the wishlist...plug-ins and sdk.

[jim coe]

So if i understand correctly, the best method is to make an object, using booleans, in a modeler application that does them, export as *.obj (or another compatible format) and import into ZBrush as a tool?

Since there are several free modelers out there, that doesn't seem too bad.

What about scale? How do you know how big to make an object in another app for import into ZBrush?

[Stonecutter]

You can scale an imported object using Object->Modifiers->Scale, Jim... ;)

And you can do closed objects that for all intent fulfill the need...Just takes a little planning...


http://www2.zbrushcentral.com/uploaded_from_zbc/200309/user_image-1062637156zmx.jpg


http://www2.zbrushcentral.com/uploaded_from_zbc/200309/user_image-1062637207ysm.jpg

And
Welcome Aboard, N! :D
;)

[aurick]

Hi Jim,

All objects imported into ZBrush arrive at a size of 1 ZBrush unit along their greatest dimension, with the other dimensions scaled appropriately. When the model is exported again, that scaling is reversed so that it returns to its original application in precisely the same size that it left.

If you have two objects that you wish to bring into ZBrush and you want them to retain their same relative scaling, there is an easy way to accomplish this. Add a small piece of extra geometry on either side of the model along its longest axis. For a human figure, this would be above the head and below the feet. Then export those two extra bits of geometry along with EVERY part of your model. When they are brought into ZBrush, the extra geometry will be used to define the scaling and so all parts that share the extra geometry will also share the same scaling.

[Stonecutter]

Cute scaling trick Matthew! ;)
Trust you to have an ingenious solution! :cool:

[aurick]

It gets better, actually. :) When you import multiple meshes this way, you can draw the first piece and place a marker. You can then select the other elements and use the same marker to draw them all. They will not only be drawn to the same relative scale, but also the same relative positions and orientations as they had shared in the original program.

[jim coe]

Very cool aurick!

More good info...
Then there is the "Half Pipe" demo, showing that holed shapes can be squared, thickened, flattened, etc.