ZBrushCentral

What causes this white line around the image?edit

ZBrush Usage Questions
#1

I have had this happen several times over the past year and a half or so, and I am curious on what causes it and how to fix it? Notice that white ring around the head…it outlines it…thnx for helping on this mind bender…

thnx for the feedback ya’ll. Well I will keep this all in mind the next time it happens for sure. Great info!!! Before I leave this particular image I am giving a quick show of what I did with her. At first I modeled the plain model top left…I then got some feedback from the guys in chat about what was wrong with her, because I know that I have a tendancy to make my females look a bit on the butch or masculine side. That is because after doing mostly male figures all my life due to comic books, it is hard to smooth those curvy curves that make em’ look dainty. So I worked her over and came out with the second one and popped some green eyes in her. That is where and when the infamous white line showed up, during that render. I then repainted her a bit and added some good ole sphere hair and model that helmet hair in place. One thing I realized doing this is that the color of the hair really matters when placed by the skin. Different colored hair really changes the over all pallor(sp?) of the skin. I wanted her actually to have the washed out fair skin look with the fiery red hair…The more red the hair got the more the tone of the skin changed to a more yellowed/beige color. I guess that happens with people in real life when they color their hair differently. She ended up also a bit younger looking to me than I originally intended. I think that was due to the full pie shaped ness of her overall head along with the round eyes. The pert shorter nose is something that I have to try to use more also for these type heads. I tend to personally like an enlongated longer hooked nose…well I just thought I would share some of my demented process. O yeah…and I used three layers on this simple head. Time for the next doodling…thnx again

#2

Looks like a lighting issue to me Ron.

#3

I’ve also noticed this-did not seem to have these white lines in earlier versions-it is at times a minor annoyance-no idea as to the cause.

#4

I can think of two possibilities. One would be if you have filled the layer with black, and a different material than the head is. More likely, though, is that you may have switched one of your lights to be a backlight. Clicking its square in the light preview window will cause it to switch between back illumination and front.

#5

the backlight was one of the first things I checked…taht wasnt it…but I dont know about the fill color…but I didnt fill intentionally if that was the case. I normally dont fill the background when doing these type models…and when I have encountered the problem I have either just closed the doc and started over or blur it out in another program like psp…thnx so far though yall…its appreciated…

#6

I don’t profess to know how to fix this problem but I have run into it myself. And usually it is when I have used a material that has a sort of clearish outer edge, like jellybean or when I use the single layer brush it always appears unless I decrease the rgb & intensity. I don’t suppose this will help much but I thought I would post my experience with the mysterious white line.

:slight_smile:

#7

after examining the file, I found that the problem lies in the material difference. The background material was the flat shader and the head a fastshader. I think it was also that the head was touching the clipping plain and that is where the two materials interacted.

Hope that cleas thing up.

#8

Also some render options can get outlines around objects similar to that white line.

#9

Hey Ron,
Oh, oh, I know the answer to this one! I had this happen to me several times in the past… I solved it though!

This happens when you bake the image layers and then change the background color after baking.

Always be sure that you have the background the way you want it before you bake the image!

example… create a head on a black background, texture it and light it and then bake it. Next, change the background color to white… you will notice that the head now has a black line around it.

The only way to stop this from happening is to finish your background before you bake your image.

Take care man,
Michael

#10

I’m actually getting ready to start trying to attack the problem with some new techniques I’ve found. Apparently when you anti-alias the image for rendering in a 3D package it mixes edges of you’re object with the background color and the mask suffers. In Maya the Composite threshhold options can help clear this up, but like I said I have to do some experimenting. I this helps a little bit with your renderings.

#11

ambient occlusion settings can cause it sometimes too…use it sparingly…i prefer to use depth in render menu to ao in materials…not sure if that’s it but just in case.