آموزش ماسک کردن مدلسه بعدی در زیبراش ZBrush Masking geometry

  When you are starting to add detail  to a model, there are going to be times

  when you want to apply a mask to the  model to restrict changes to certain areas

  on the surface. Masking in ZBrush is  kind of like masking in a digital paint

  program such as Photoshop. You're  basically creating a selection and saying

  anything within that  selection cannot be changed.

  The great thing about ZBrush is you  are actually doing this in 3D to a 3D

  model. Applying mask is pretty straight  forward. I'm going to start of with the

  most basic way to apply mask and  that is to use a rectangular selection.

  So to do this, I have my model here,  and I have the greenMan_v01 model loaded

  on the canvas, and it's in Edit mode,  and I'm going to hold the Ctrl key and

  I'm going to drag from an area on the  canvas, a blank part of the canvas and

  you can see this rectangular selection  appears. Now as I drag over the model,

  you can see the mask portions in the  semi-transparent part of the marquee. I'm

  just going to let it go.  Now I have my mask. The mask is the  dark area on the model. As I rotate the

 model, you can see that it went all  the way through. I'm going to zoom in to

the model by dragging on the Scale  button here, and I have my standard

  sculpting brush chosen; that's the  default settings and that's chosen from the

  Startup Sculpting  Brushes here on the left shelf.

  And I'm going to start painting on  the surface of the model and you can see

00:01:28  if I paint over here, nothing  changes. If I paint over here, I'm making

00:01:33  sculpting changes. You can actually see  this area is pushed out and right there

00:01:39  along the border of the mask,  we have a hard edge to it.

00:01:43  The Masking controls themselves are  found in the Tool palette, so I have the

00:01:47  Tool palette here loaded in the tray  and to get to the Masking controls, I'm

00:01:52  just going to click on the word  Masking and that reveals the controls.

00:01:56  We are just going to talk about some  of the basic controls in this movie and

00:01:59  get a little bit more advanced in some  of the other movies later on. To get rid

00:02:04  of the mask, I can just press the Clear  button and the mask is gone. And I can

00:02:08  clearly see the changes I made to the model.

00:02:10  So to create a mask once again using  rectangular selection, you just hold the

00:02:16  Ctrl key, drag across the model, now  you have your mask. If I want to raise

00:02:23  parts of that mask or unmask, I hold  Ctrl+Alt and drag and I have this white

00:02:28  selection. Now I have this different  shaped mask. I'm going to zoom out here,

00:02:36  hold Ctrl+Alt and drag across the surface.

00:02:42  Another way to apply a mask is to use  the Lasso selection, and the Lasso button

00:02:49  is found here on the very bottom part  of the right shelf. Once I click it, it's

00:02:54  activated, and when I hold Ctrl  and start dragging, I get a free form

00:03:00  selection. So I can add to this mask  by just dragging over this free form selection.

00:03:05  You notice that the edges of the mask  are blurred when I let go. You can blur a

00:03:13  mask anytime by clicking on the Blur  button. You can also sharpen the edges of

00:03:17  a mask by clicking on the Sharpen  button. So now, I'm bringing some sharpness

00:03:21  to that selection that I made.

00:03:24  Once again as I paint with my sculpting  brush, only the areas that are unmasked

00:03:30  get changed, so the poor guy has lost  his mouth now. I can also invert the mask

00:03:38  by clicking on the Inverse button and  this just swaps the masked areas with the

00:03:45  unmasked areas. And I can unmask the  entire object by clicking on MaskAll.

00:03:50  I'm going to clear the mask now. One  other way to apply a mask to a model is to

00:03:58  just paint directly on the model. So  if I press the Ctrl key and drag on the

00:04:03  surface of the model, now you can see,  I'm actually painting on the surface of the model.

00:04:10  I can change my brush size by dragging  on the Draw Size button and I can create

00:04:16  a very detailed mask. If I hold Ctrl+ Alt, I can erase spread of the mask. So

00:04:24  you could really send a fair amount  of time here creating a very custom

00:04:30  detailed mask.

00:04:31  Let's say I'm creating some kind of fine,  or something crawling on the surface

00:04:36  of this object. I'm holding Ctrl+Alt,  raising, I'm going to zoom in here a

00:04:45  little bit. I'm just drawing out my mask.

00:04:57  Now I will invert the mask by  clicking on the Inverse button, paint on the

00:05:01  surface. I can even be fairly slopping  my painting because the mask is making

00:05:11  sure that only the right parts of the  surface are receiving the change. And

00:05:15  when I clear the mask, I have this nice  detail on the surface here; all created

00:05:28  very easily using the mask.

00:05:30  That's the basics of applying a mask  to a 3D object. You are going to find

00:05:34  there are great way to control detail,  so you can really get in there and push

00:05:39  the limits of your creativity  by applying mask to your object.