True displacement problem

Support Modeling
#1

Hi!

I’m having some problem with the displacement feature.
“Bump” works fine but as soon as enable “true” the displacement goes of in a strange direction.
I’m using an image texture that is transparent with only two white circles on it.

Maybe you can spot easily what I’m doing wrong.

If necessary I will post the .blend-file.

bump:

/uploads/default/original/4X/d/3/9/d398c25cf088ed05c7bf724dab24b521674cedf2.PNGstc=1
bump.PNG768×496 96.7 KB

true:
/uploads/default/original/4X/7/d/a/7dae771c8e5b8615f399c527e79d0b18a1033bb3.PNGstc=1
true.PNG468×512 28.2 KB

Thanks!

/Erik

Attachments

bump.PNG768×496 96.7 KB

true.PNG468×512 28.2 KB

#2

Try removing doubles, recalculating normals.

Post the blend

#3

Thanks for your suggestion, Photox. But it didn’t solve the problem. :frowning:

Here’s the blend.

/Erik

Attachments

front_glass_holes.png1024×1024 2.42 KB

uv_experiment.blend (492 KB)

#4

Unapplied and non-uniform object scale. Object mode, ctrl+A -> scale to apply.

http://www.blenderartists.org/forum/showthread.php?322623-How-to-ask-questions-effectively-on-blenderartists-org-support-forum

#5

Awesome JA12!

Thanks for spotting that. Had no idea that could have these consequences. I love this forum.

Whats the best way to make this look good/smooth? Subdivide that particular area? Increase subdivide surface settings? Increase resolution of bitmap? Something else?

Thanks again!

#6

Thanks for these links. They are very educational and inspiring.
For my current model, I think it will do fine with an image texture. Using bump + true gave me pretty nice results.

I’ll continue to pursue other techniques for my future projects though. There are sooo many ways of achieving the same result…