Hi everybody,
Someone can tell me how can i do a simple broken egg…I use this for a WIP
By
Leo
Hi Melampo
I erase the frist solution 
It was not so clear then the next below
Pilou
You can also model an egg shape, make it a double-sided mesh (Tool>Modifiers>Double) and then use a transparent texture to “break” it. Actually, you’ll use two textures – one for the main part of the shell and an inverted one for the cap. You’ll also use two copies of the sphere.
Only pure black will be turned transparent. This means you can use nearly black for a crack or two while still having full transparency for the hole.
Another solution
Pilou
Thank for all i’ll try after.
by Leo
P.S. i speak english not so well, i read and i understand somethingh…if this not a problem is possible to know what’s happened to Menta7
Hi melampo,
Mentat had some problems with another user and he is thinking about leaving the forums (and everything) because this person was making some fun of his work.
I’ve seen him do it once, the moderator cleaned up the post but it’s sad people can be so not mature. 
Is my opinion, in the net you are free to delete or filter evry think you want…
Thank you
By Leo
Let’s try to keep the thread on topic, ok?
Just for the fun of it, here’s an eggshell created using the transparent texture approach.
The cap texture’s colors are inverted, creating a cap that is an exact fit for the main part of the shell. After creating the cap texture, I added a few cracks to the body. The Tool>Modifiers>Double option is turned on so that the polygons are double-sided, which lets us see the shell’s interior. I actually spent more time setting up the render than I did creating the egg!
thnx Matthew!!! very enlightening…I learned something new…ie the “double” button…dooohhhhhhhhhh its always the little things…very kewl thread… 
Hi Aurick
Tricky as usual 
The alpha texture is use on a sphere3D modify on one Axe or a circle3D (an ellipse)?
You haven’t explain this part of the creation of this ostrich egg
Maybe it’s possible to thicken a little the shell but how ? New challenge
Pilou
It’s not an alpha texture. It’s a regular texture that has been wrapped onto a slightly modeled Sphere3D.
First I used Radial symmetry on the sphere to turn it into an egg shape
Next, using TextureMaster, I used the Polymesh3D star shape and some cubes with ZADD off and RGB on (black color) to create the hole. After picking, I took the texture to Photoshop.
In Photoshop I modified the channels on the top one to remove all shades of grey leaving just black and white. I used the magic wand to select the black, enlarged the selection slightly and smoothed it, then filled it with 100% black. I saved that as one texture, then I inverted it and saved the mirror.
Back in ZBrush, I imported the textures and applied the body one to the egg as a Texture with Transparent turned on. Everything that was black was turned invisible. I snapshot that to the canvas, loaded the other texture with Transparent on, and positioned the cap.
That’s it!
Regarding the thickness of the shell, that’s an inherent problem with this approach. Polygons have no thickness, and when you cut a hole in a primitive that fact is revealed. You COULD snapshot the egg, resize it just a hair smaller, then snapshot it again. This would give a double wall, which you could fill in by hand using the 2.5D brushes.
By the way, I did this using a texture of 2048x2048. When using transparent textures, it’s a good idea to make them very large. This is because the transparency requires 100% black to work (0,0,0). The slightest bit off (even 1,1,1) and it stays visible as gray. Well, it’s virtually impossible to completely eliminate a bit of transitional gray between the two, which ends up giving a faint black edge along the transparency. However, the larger the texture is created at, the more compressed that gray area becomes when wrapped onto the model and the less visible it will be in your final render. You can see it slightly on my egg shell, which is exactly what I wanted in this case to help hide the fact that the polygons have no thickness. Had I created the texture at 4096x4096, you probably wouldn’t see the black at all.
Hi aurick, i’ve followed your tutorial :this is the result.
I have a question;how can i do to disappear the black line?
By
Leo
P.s. Thanks for all to everybody
It looks like your texture is antialiased, so some pixels at the boundary are not 0,0,0
Heh heh. Read the last paragraph that I posted right before you did.
Also, work at a canvas size that is twice what you want for your final image. Use the Zoom>AA Half button (Ctrl+0) right before exporting. This resizes the canvas to the final size, provides great anti-aliasing on the edges, and will also help to remove those black edges.
If you also used the texture as a selection mask, and did just a bit of inflate, would that create the look of thickness along the edge of the shell?
No. It’s a nice idea, but remember that a mask is based upon the polygon structure of the model. So diagonal lines will always end being jagged when masked (less noticeable the higher your poly count, but still true just the same) – and so will the edge of the deformation as a result.
He he
The backstage of a little egg is very instructive
Why not take a profil (as my solution) with a very little infate (4 “pixols” instead of the sphere 3D?
The rest of demonstration as a same.
Pilou
Thanks Aurick
I speak not so well and when i see you long tutorial… ok i’m lazy…everything is illustrated.
This remember the school time:“attention please, read carefully…”.
By Leo