ZBrushCentral

Making a bulge and an hollow with the same stroke ?

ZBrush Usage Questions
#1

I tried to find something about this but I don’t think I am using the right words, so I apologize in advance if I miss the thread.

I wanted to know if it was possible to make a bulge and an hollow at the same time with one stroke?

I tried to do it in differents stroke and then grab it with MRGBZgrabber but it doesn’t seems to work, when I use the resulting alpha I don’t have a good result.

I tried to tweak the brush curve but I didn’t get anything good.

I want to get something like the pix.
[stroke.jpg]

#2

That is curious. It can make the buldge, but not the alt-buldge. :smiley: Maybe this should be chalked up to zQuirks?

Capture.JPG

I used the attached alpha.
Well, at least I found a quick way to terrainize using snakehook. :smiley: lol

#3

I think this is to be expected… a brush will either Add height (ZAdd) or remove it (ZSub) but not both at the same time. One way of going about this is to use ‘replay last stroke’ after changing the brush params and do it in two parts.

That goes for most brushes anyway. Zmorph can do both but I can’t think of a way of using it for your case…! I thought I had an idea approaching for a second… :confused:

#4

I think you would have to switch to an alpha that was somewhat inverse, and then hit reply last stroke to achieve the effect.

#5

No alpha will allow a brush to both add and subtract simultaneously. This is because brushes look at alphas using a black-to-white range with black being no effect and white being maximum effect. For an alpha to do what you’re looking for the brushes would have to see 50% gray as no effect, which is not the case.

I can’t think of any way off hand to create both positive and negative sculpting with a single brush stroke.

#6

I see…
Although… , having the ability to set how deep and how high the brush would sculpt would be quite helpful. Like setting the numbers on pinch or clay would brush at a certain level. It wouldn’t matter much, but in detailing like in drawing wrinkles, it would add one of those tiny almost insignificant realism to the overall drawing.

#7

Here is a quick test with the left to right gradient alpha. Did one stroke, switched to sub and then hit repeat last stroke. It turned out better than I expected. It makes me wonder if white has the opposite meaning to zsub (less strong?)

I think you could get some neat effects with this. Maybe also really interesting if you used lazymouse too.

Quicky zscript attached.

add-sub.jpg

#8

Thannnnk you.
You have implemented exactly what I mean with the new Stich brush, it makes me smile when I saw that you have done an alpha for seams, that was exactly what I wanted to do.

Now I have to open a new thread to ask for a uniform perspective distortion that is matching with all other appz :rolleyes: .

I can wait 3 more weeks for it :smiley: I got a new toy to play with during these weeks.

Once again thanks for this update, it’s almost perfect :wink:

#9

The key is Alpha: MidValue. :slight_smile:

r

#10

Makes sense.

#11

Sure it is :smiley: That’s why I thought about it, I knew that the displacment works like that, and now we got a new brush who is handling it.

The alpha who was provide with the new brush really make me laugh, and I was afraid at the same time.
Do you have spies in my home? I was exactly looking for this kind of seams.

[link_pannel.jpg]

Look at his torso :wink: Here is the stich :smiley: Now I don’t need to make some spline in max anymore.

Thx again :wink: