Forum: Poser - OFFICIAL


Subject: Black artifacts on the Millennium Subdragon's Wings

piccolo_909 opened this issue on Jan 18, 2013 · 7 posts


piccolo_909 posted Fri, 18 January 2013 at 11:52 PM

I started using the Millennium Subdragon that i purchased a while back. Everything works fine except for these black artifacts i get on his wings.

http://s20.postimage.org/4p913ch0t/dragon_test.png

I'm using poser pro 2012 SR3.1, and my render settings are attached. This hasn't happened on any other figure before.

After playing around a bit with the settings, i noticed that having "smooth polygons" turned on increases the artifacts a LOT. So i turned it off, and i still get those 2 triangles. I also turned off "smooth polygons" on the individual wing parts, but that didn't change anything. I tried changing poses, morphs, textures, and lighting, but same results. Finally, i turned the shadow min bias on my raytraced main light to .2, since i read that this sometimes causes artifacts if it isn't low enough, but those 2 triangles still appear.

Does anyone have any idea what's going on or how i can fix this besides using photoshop?


LaurieA posted Fri, 18 January 2013 at 11:55 PM

And you tried checking "Remove backfacing polys"?

Almost sounds like the thinness of the wings (assuming the wings have thickness) is too much for Poser. Sometimes if you check remove backfacing polys it fixes it. It's worth a shot ;).

Laurie



piccolo_909 posted Sat, 19 January 2013 at 12:11 AM

Laurie! Thank you =) That worked. What exactly does checking that setting do though? I did a comparison render of it both on and off, and the only difference i saw was that it removed those black triangles lol.


AlanaDale posted Sat, 19 January 2013 at 12:21 AM

The wings do have a top and bottom surface.  The equivalent distance btween layers is about 0.12 mm

Poser may goof on round-off for some of these.

I just added a displacement node attached to a simple_color and set value to 0.001 cm


piccolo_909 posted Sat, 19 January 2013 at 12:41 AM

AlanaDale: Where did you attach the displacement node and simple_color to in the advanced material room?


AlanaDale posted Sat, 19 January 2013 at 1:01 AM

I added to 3_WingsTop and 3_WingsBottom.

Depending on angle of wings, you may have to increase value (could be 0.2)

Make sure you have "use displacement maps" checked in your render settings


piccolo_909 posted Sat, 19 January 2013 at 1:24 AM

Thanks :) Just tried it out and that also worked well.