ZBRUSH 4R8 Lasso mask issue

alezzmateo

Hi every body , i share with you my problem when i use the lasso tool with mask, I should select only the area of the lasso , but i select more than that area. It hapens me in R8 R8p1 and R7p3. Thank you.
https://www.dropbox.com/s/qoww9v78nqiqdet/problemamasks.avi?dl=0

kanga

You have symmetry on. Go to the menu at the top of the interface, choose transform. You will see Activate Symmetry in the drop down palet. Turn off all the axis buttons. You should be good to go.


You are pressing the hotkeys by accident while you are modelling.

alezzmateo

Hi Kanga , thank you very much for your response , but i dont understand well , when i am modeling i want the symmetry be activated , but should be desactivated when i do mask? any way , in the menu tranform symmetry i have all axis buttons desactivated. what hotkey i'm pressing by accident? thank you very much for the help

kanga

Ah yeah,... go to the brush menu (top interface) and find AutoMasking, find the button 'Bsckface Masking' and press. This works with the brush but doesnt seem to work with the lasso. So if you have to use the lasso hide the other half of the mesh before you mask.

cryrid

 when i am modeling i want the symmetry be activated , but should be desactivated when i do mask?

Correct (unless of course you want a symmetrical mask). Typically the 'x' key can be used to toggle it on and off. 

If all axis are disabled then you shouldn't be getting any symmetrical strokes, but since your transform menu is hidden in the video I'm not sure what your current settings actually look like (it's possible, for instance, that you actually disabled the wrong axis since there are several Axis settings in the Transform palette, and not all of them relate to symmetry controls). 

It's also possible you have a phantom double cursor, which can depend more on your operating system and settings. With Windows it can happen when your computer things you are using multiple displays even if you aren't. 

alezzmateo

Ey guys , thank you for your comments , i recorded a new video , i figure out , that the isue happens when the viewport is not snapped in to a orto view, i think occur in perspective and orto view mode. I show you the brush options and transform options , seems there is a issue of the software , do you have the same issue? thank you.
https://www.dropbox.com/s/4cyer29da0y31sr/problemamasks2.mp4?dl=0

cryrid

I just see normal symmetrical behavior, and no transform/symmetry options shown. 


The lasso is punching straight through the screen view, and the result is then made symmetric according to the active axis (you have symmetry turned on, which is why you see a mirrored cursor). 

Mask Lasso, Mask Rect, etc are designed to cut straight through the screen view like this. It's just how they work, and backface auto masking will not affect them since they aren't standard brushes. MaskPen works more like a standard brush that draws directly on the surface, and so it is the only form of masking that will work with the Brush options.

Your options for the lasso are to either disable symmetry, or to hide the half of the mesh you don't want to effect (but that will likely also require you to turn off symmetry anyway in order to properly isolate one half). 

alezzmateo

Hi Cryrid!! thank you for the explanation and the image , i understand , but my issue is when i use mask in lasso mode , some times if i'm not in a snaped viewport , create 2 masks LINK


Thank you man for your time and patience

cryrid

 i understand , but my issue is when i use mask in lasso mode , some times if i'm not in a snaped viewport , create 2 masks

The image explains exactly why this happens. The lasso always cuts straight through the object to mask both sides. It does this regardless of the symmetry axis, and uses the current screen view / orientation. So when your object is rotated ever so slightly, it changes where the mask ends up falling on the back side (meaning if the view isn't centered, the back mask will be off center) as a result. Both sides get masked either way, then the symmetry option /axis kicks in (the blue text of the image) which is why it looks like it is drawing another mask close to front cursor (because the mask on the back was off center, meaning the symmetrical application will not line up where you drew the mask on the front). 

Your transform menu shows you have Symmetry active on the X Axis. To disable it, click on the "Activate Symmetry" button so that it is no longer orange. 

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You might get a better idea of what the lasso is doing if you use a different object that is easier to visually track, such as the demo head/face. Draw a single mask on the nose, then rotate the head to see that it also cut through to mask the back of the head. Rotate to a 3/4 view and use the lasso to select the ear. If the opposite ear isn't lined up, you'll be cutting through to mask some other part of the head instead. With symmetry on, both of these areas will be masked on both sides. 

Edit: An alternative image to explain what is happening.

alezzmateo

Great cryrid, i see i didin't understand at the first time , but i see better now  how the lasso works , i will be into acount when i'm modelling something , trully thank you man