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Hiding and showing polygons

From: ZBrush 3 for Windows Essential Training

Video: Hiding and showing polygons

When you are working on a model, you may want to isolate parts of the model just so you can work on a few details of one section. Let's say you are working on just the eye area of a model, you can actually isolate the eye area of the model by hiding everything else except the eye. To do this in ZBrush, there are few simple controls. I have my greenMan_v01 model loaded on the canvas and this is available to premium users. You can also use the example models that come with ZBrush. I have it loaded on the canvas and I'm in Edit mode. I'm going to rotate to a side view here, just start dragging a blank part of the canvas and I'm going to hold the Shift key and that will snap it into a side view. And I'm going to zoom in to the model. I'm going to press the Alt button, drag on the canvas, let go the Alt button and zoom in.

Hiding and showing polygons

When you are working on a model, you may want to isolate parts of the model just so you can work on a few details of one section. Let's say you are working on just the eye area of a model, you can actually isolate the eye area of the model by hiding everything else except the eye. To do this in ZBrush, there are few simple controls. I have my greenMan_v01 model loaded on the canvas and this is available to premium users. You can also use the example models that come with ZBrush. I have it loaded on the canvas and I'm in Edit mode. I'm going to rotate to a side view here, just start dragging a blank part of the canvas and I'm going to hold the Shift key and that will snap it into a side view. And I'm going to zoom in to the model. I'm going to press the Alt button, drag on the canvas, let go the Alt button and zoom in.

Don't forget there is another way to do that. That is to use the Scale button on the side shelf here. I'm going to focus on the eye area. I will just hold the Alt key while dragging on the canvas to reposition it. And now I'm going to make a selection and I'm going to hide all the parts of the model that are not in that selection. To do this, I'm going to hold Ctrl+Shift and I'm going to drag a selection marquee on the canvas, from a blank part of the canvas over the eye and you will see this green box appear.

Everything within the green box is going to remain visible; everything outside of the box is going to be hidden. I'm just going to let it go by releasing my pen from the tablet or if you are using a mouse you can release the mouse button, and after a couple of seconds I have my selection. Now I just have the eyes and I can really get in here and work on the eyelids and the shape of the eyes and so on and so forth without worrying about either accidentally changing another part of the model or having that part of the model distracts me. If this particular model had the objects that were in front of the eye, I could hide those and then just get to the eye.

And one of the side benefits is the performance in ZBrush actually improves when you hide parts of the model, that's especially a model is made of a millions and millions of polygons. When these sections of the model are hidden, they haven't been deleted but as far as ZBrush is concerned, they don't exist. So ZBrush can concentrate all of its processing power on just what's in visible on the canvas. And you will actually notice when you hide parts of the model that the performance as you rotate the model and as you sculpt on it, it's a little bit faster, so that's an extra side benefit for hiding parts of the model.

Now if I'm done from working on the eyes and I want to bring back the model, all I need to do is press the Ctrl+ Shift Key+ and tab, and after a couple of seconds, the model reappears. I want to press the F key to center the model again on the canvas, so we can see the whole thing. And I'm going to demonstrate that a couple more times. This time I'm going to hide everything but the top area of the model. I'm going to hold Ctrl+Shift drag a selection marquee, so I have my green box. Then I'm going to let it go.

And after a couple of seconds, everything in the lower part of the model that was not in that green box is hidden. To bring it back, I will just press Ctrl+Shift, tab on the canvas. And now everything is back. To speed things up a little bit, I'm going to lower the resolution on the model, bring it down to Sdiv Level 5. Now if I want to do the reverse, if I want to hide just the selected area of the model, I can do this by holding Ctrl+Shift, drag on the canvas just like we are doing before to get that green box, but now I'm going to let go off the Shift key and then let go off the mouse, and everything that's within the red area will be hidden and the other parts of the model will remain visible.

There we go, this face is gone. To bring it back, just to Ctrl+Shift, click on the canvas. This one takes a little bit of practice to get used to. I'm doing it a couple more times here. I'm going to press Ctrl+Shift, drag my green box, let go the Shift button, so it turns red and then let go off my pen on the tablet or the mouse key. To bring it back, Ctrl+Shift, tab on the canvas. One another way, I can make a custom selection is to actually use masking and this is helpful if I want to hide parts of the model that are not necessarily connected. So I can hold the Ctrl key and start painting a mask on the object.

I'm going to paint a few unconnected areas. Then I'm going to go into the Tool palette to expand the Masking sub-palette and press the HidePt button. And this hides all the areas of the model that have not been masked. To bring everything back, I will just press Ctrl+Shift, click on the canvas. You might find that the mask has left a little bit of an edge there. To get rid of that, you can just press the Clear button.

When making your selections, you can also use Lasso selection if you want to create a free form selection. I'm holding Ctrl+Shift and I'm dragging on the model, but since I have the Lasso button activated on the right shelf, now I have a custom shape rather than just a rectangular area. And this is the same if I want to hide parts of the model, Ctrl+Shift, drag a custom area, let go off the Shift button then let go off the mouse or the digital pen from the tablet and then here we go. I'm going to move to a lower resolution here.

It doesn't matter what resolution you are on when you are making the selections, it's not going to affect the way that you selected, other than of course, in a higher resolution model you are going to either select or de-select more polygons than the lower resolution model. You may find that as you are making your selections activating the Pt Sel button in the Transform menu; this is the Transform menu right here. I have this activated and when I'm working, I have this activated at all times. It's off by default but you will find that by activating this, the selection is a bit more accurate especially when you are going in there to select individual polygons.

So using the Ctrl+Shift key combination to hide parts of the model will allow you to just focus on small sections at a time, so that you can really work on the detailing and at the same time it also improves the performance of ZBrush.

Show transcript

This video is part of

Image for ZBrush 3 for Windows Essential Training
ZBrush 3 for Windows Essential Training

80 video lessons · 10302 viewers

Eric Keller
Author

 
Expand all | Collapse all
  1. 2m 27s
    1. Welcome
      30s
    2. Using the example files
      46s
    3. Overview
      1m 11s
  2. 26m 18s
    1. Understanding pixols
      1m 58s
    2. Establishing canvas size and color
      2m 30s
    3. Positioning 3D objects
      4m 33s
    4. Working with trays and palettes
      2m 52s
    5. Sculpting models in Edit mode
      3m 12s
    6. Discovering sculpting brushes
      5m 29s
    7. Saving models
      1m 27s
    8. Managing memory in ZBrush
      1m 44s
    9. Setting interface preferences
      2m 33s
  3. 1h 52m
    1. Customizing the startup 3D meshes
      5m 44s
    2. Deforming 3D models
      5m 11s
    3. Activating symmetry
      4m 35s
    4. Creating armatures with ZSphere
      8m 28s
    5. Posing armatures with ZSphere
      8m 54s
    6. Working with levels of detail
      7m 33s
    7. Masking geometry
      5m 43s
    8. Hiding and showing polygons
      6m 29s
    9. Organizing geometry using polygroups
      8m 57s
    10. Extruding geometry with edge loops to make necks and ears
      10m 11s
    11. Creating sharp edges with the Crease tool
      4m 19s
    12. Adding parts to your model with subtools
      5m 18s
    13. Posing models with Transpose pt. 1
      7m 35s
    14. Installing the Subtool Master plugin
      4m 29s
    15. Posing models with Transpose pt. 2
      13m 52s
    16. Installing the Transpose Master plugin
      5m 7s
  4. 58m 51s
    1. Sculpting with brushes
      11m 22s
    2. Choosing stroke types
      2m 20s
    3. Using Lazy Mouse
      4m 28s
    4. Sculpting fine details with alphas
      5m 9s
    5. Creating alphas
      6m 46s
    6. Creating stencils from alphas
      9m 28s
    7. Storing morph targets
      6m 4s
    8. Isolating details with 3D layers
      6m 23s
    9. Building surfaces by extracting meshes
      6m 51s
  5. 1h 13m
    1. Picking colors
      3m 2s
    2. Applying textures
      4m 15s
    3. Creating seamless textures
      3m 8s
    4. Painting models
      7m 51s
    5. Mapping 3D model texture coordinates
      5m 32s
    6. Adding sculpture reference planes
      11m 21s
    7. Applying materials
      4m 10s
    8. Modifying standard materials
      10m 17s
    9. Applying MatCap materials
      2m 22s
    10. Creating MatCap materials
      9m 9s
    11. Creating bump maps
      5m 55s
    12. Painting with photos
      6m 31s
  6. 6m 7s
    1. Exporting models
      2m 30s
    2. Importing models
      3m 37s
  7. 1h 1m
    1. Getting started with 2.5D tools
      5m 10s
    2. Modifying paintbrushes with stroke types
      3m 42s
    3. Positioning strokes and models on the canvas
      5m 14s
    4. Using snapshots
      7m 32s
    5. Understanding ZSub and ZCut
      4m 2s
    6. Creating document layers
      7m 47s
    7. Applying transparency
      3m 23s
    8. Lighting the canvas
      9m 3s
    9. Rendering in ZBrush
      6m 10s
    10. Tuning shadows
      4m 53s
    11. Baking lighting into the graphic
      2m 15s
    12. Creating a sense of depth using fog
      2m 37s
  8. 7m 12s
    1. Recording ZBrush movies
      3m 23s
    2. Using macros and ZScripts
      3m 49s
  9. 20m 50s
    1. Can't rotate or move the model
      1m 0s
    2. Can't sculpt on the model
      59s
    3. Can't adjust the lighting
      47s
    4. Can't control disappearing strokes
      52s
    5. Can't move objects smoothly with the Gyro
      2m 2s
    6. Can't move the model on the canvas
      1m 40s
    7. Can't see some parts of the model
      38s
    8. Can't subdivide the model
      2m 27s
    9. Can't control the pivot of the model
      2m 2s
    10. Can't maintain symmetry
      1m 37s
    11. Can't control subtools
      2m 28s
    12. Can't rotate with Transpose without distorting the model
      1m 51s
    13. Can't activate the Transpose tool
      1m 0s
    14. Can't get rid of blurriness on the mask
      1m 27s
  10. 26s
    1. Goodbye
      26s

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