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View Full Version : Displacement map ugly problem on edges

Andrew07
10-06-2009, 10:00 PM
Hi

I am creating a stone text logo and I am stuck with a problem.
After creating the letters I use a stone texture as displacement map to get the detail of the stone.

Everything looks great but on borders the displacement goes wrong.
I map the letters with automatic 6 planes mapping, I use aproximation editor. I think everything is ok but not. The edges look like if the had not a nice mapping and if I animate and rotate the letter, the rest of displacement works well but edges don't seem to follow the movement. As if they had not mapping coordinates.

I even try to eliminate the bevels on edges, having a hard edge and the problem persists.
I even try to create a simple cube and I apply this stone displacement and the edges looks as ugly as I am telling you.

I am really stuck with this.
Anyone can understand what I am trying to explain ???

Thanks to all of you
phix314
10-06-2009, 10:05 PM
How are you creating the letters? If it's the built in stuff, chances are you'd need to go in and really retopologize to make it a more friendly mesh. From personal experience my advice is to model the letters from scratch and make sure you're polys have good spacing, etc.

Generally with stuff like this it's a huge help to post an image of what you're talking about.
Andrew07
10-06-2009, 10:13 PM
How are you creating the letters? If it's the built in stuff, chances are you'd need to go in and really retopologize to make it a more friendly mesh. From personal experience my advice is to model the letters from scratch and make sure you're polys have good spacing, etc.

Generally with stuff like this it's a huge help to post an image of what you're talking about.



I created curves on illustrator. I used bevel plus to create the polygons letters.
How do I add an image here?
Andrew07
10-06-2009, 10:16 PM
I understand what you tell me about starts from scratch. Thats why I tried to apply this displacement to a simple cube mesh and I find the same problem.
phix314
10-07-2009, 04:19 AM
I understand what you tell me about starts from scratch. Thats why I tried to apply this displacement to a simple cube mesh and I find the same problem.

I don't think I'm explaining clearly.

"out of the box" creations are rarely set up for displacement right off the bat. Even though you UV'd the letter again, you need to make sure your UVs are optimized for displacement. A box doesn't have an out-of-the-box displacement-friendly UV layout. You can't have 10 shells on one letter and expect the displacement to look good.

So, my advice, someone may have another solution, but put the words as an image plane, and create them using traditional box-modeling techniques (or whatever else you may do), UV like you would a character or anything else, and then set up your displacement.
Plasmatic
10-07-2009, 09:52 AM
I'm guessing you're using 3ds Max, because I've had that problem earlier myself. Try turning "smoothing" off in the displacement dialog (F10 > Renderer > Shadows & Displacement > uncheck Smoothing). I'm not totally sure if that's the solution to your problem though. I'm currently not able to get into Max, so I can't test anything.
Andrew07
10-07-2009, 02:20 PM
Phix:

I get your point. So I must be aware that creating the letters with curves and bevel plus is not the right way of working if I will make displacement later ?

Should I unwrap the letter as I would do it with a character. Isn't there a simple way to do that using planar projections ?

Thanks
Andrew07
10-07-2009, 02:21 PM
Plasmatic:

I am using Maya 9 !
phix314
10-07-2009, 04:56 PM
Personally, I've never found a solution that didn't require modeling and UV adjusting. I, too, hoped for a way to displace letters with relative ease, but no :)

This is just me, however. Surely somene has come across a solution/workflow.
Andrew07
10-07-2009, 07:25 PM
Thanks PHIX !!!

I am not an expert on Maya and I wasn't sure if I was doing something wrong.
Mahje
10-13-2009, 10:05 PM
Did u sew the uv sides together? Looks to me that your problem is happening were u have a uv border.
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