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Artefacts
show user profile  mitchgc
Hey.

I'm learning 3ds max and I've done two models, both of which are ridden with artefacts. I've tried cutting to make more edges but it just pushes the artefacts to other places...

Here are my models:

Edit: the artefacts on the plane towards the end near the rear wings.

So how can I get rid of these nasty things?

Cheers.
read 684 times
3/7/2009 4:13:19 AM (last edit: 3/7/2009 4:13:59 AM)
show user profile  mrgrotey
These are problems with your smoothing groups. go into polygon mode, move to the bottom of the modify panel and make sure the faces that have the artifacts have the same smoothing group number, but faces that are coming off at an angle have a different smoothing group number. two faces that have different number to each other will create a visible edge between them, two faces that share the same number will have a smooth transition.

Therefore, regarding the plane, the unsmoothed faces at the tail end should have the same smoothing group munber as the rest of the side of the plane. whereas the faces on the wheel arch rim should have a different number to the faces on the front wing of the car. faces can have more than one smoothing group so make sure they arent sharing the same number




read 677 times
3/7/2009 4:22:37 AM (last edit: 3/7/2009 4:25:32 AM)
show user profile  mitchgc
I'm using edit poly is that any different than polygon mode?

I think I understand what you're saying.. I set the whole rear panel of the plane to #1 smoothing group and that fixed it, but then it was shaded differently to the other panels, so I did the whole body of the plane... I also used auto smooth instead of manually selecting the group as it seemed to work. I made sure the polygons didn't have more than one group selected as per your advice.

It still has some slight artefacts as you can see but I'm not sure if that's normal or not?

As for the wheel guards, I selected each polygon on the guard and did another auto smooth.. they are now #3 instead of #6 but it still looks the same, so I presume I've really misunderstood your advice haha.

Edit: By the way, I just had a look at your website... amazing work!

Cheers!
read 664 times
3/7/2009 4:57:40 AM (last edit: 3/7/2009 5:16:35 AM)
show user profile  mathias-soeholm
Your mesh is not good, see if you can try to maintain quads.

Keep it up ;D


Website - Twitter

read 613 times
3/7/2009 9:52:13 AM (last edit: 3/7/2009 9:52:13 AM)
show user profile  horizon
Have a look at this video, it shows how smoothing works: http://guerrillacg.org/home/3d-polygon-modeling/smooth-shading



read 599 times
3/7/2009 11:55:22 AM (last edit: 3/7/2009 11:55:22 AM)
show user profile  mitchgc
That video was pretty cool haha. Only thing I don't understand is how to change the angle of the vertex normals like they did.

From what I saw about smoothing, I figured that if I auto smoothed stuff below certain degrees it will still look good. Is that more or less the idea? I use auto smooth because I don't know what group number to set each polygon to when doing it manually... I don't know at what angle you should or shouldn't change it, etc.

I tried making more quads as per mathias' advice but I think I'm doing it wrong... :s


read 585 times
3/7/2009 6:20:16 PM (last edit: 3/7/2009 6:55:36 PM)
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