The Jagged Edges

#1

Any idea what causes, or how I can eliminate, the jagged edges appearing in the internal reflections of the wine glass in this image?

I’m not using GI or reflection maps, and there is only a single light source — an area light. The whole scene is about 13 world units across. Very basic.

You’ll need to view the image full size to see the jagged edges, but they should be fairly obvious.

http://homepage.mac.com/markalanthomas/.Public/eandt-metal-whitewine.jpg

#2

Anything in the ‘World Maps’ section?
Very nice image by the way. I like it a lot.
Michael.

#3

Thanks! It started to get magical when I swapped the spotlight for an area light. It’s definitely worth the render hit. And yeah — the jaggies were there when the light was a spotlight too.

I did have an old reflection map in the world maps section, but it was disabled. I went ahead and deleted it anyway, but the jaggies are still there.

There’s so little in this scene that I’m kind of running out of stuff to check. Maybe it’s just a bug?

I wonder if I could render a multi-layer file and just blur that layer in PS.

#4

Is it for a still? In which case your’e in good shape.
Still it would bug me that with such a simple scene this is happening.
Michael.

#5

Did you try to turn off that E&T wine plate to see it comes from that? Then try turning off the background, or if there is global rfl map, or even the liquid and see which element is causing those jaggies.

#6

Did you try to enable “Cull Backfaces” on the glass?

#7

Did you check the power supply unit. :slight_smile: lol.

#8

Hiding the E&T slab doesn’t fix it, which is kind of a surprise since it’s quite a hunk of complex geometry and prone to shading errors. If I cull the backfaces of the glass and wine, that does eliminate it, but then the wine glass looks all screwy. So maybe I’ll try swapping out the cove object and use a sphere instead. That’s the only thing left to tinker with, I think.

Then again, maybe it is the power supply unit! Damn these machines!

Thank you for all of your help. It’s great having this forum as a resource to bail me out of my little 3D catastrophes!

#9

Damn my eyes! Solved! I’d swept the wires for the glass and the wine as surfaces rather than solids. I re-swept, yielding solids, et voilà ! Jaggies gone!

#10

Here’s a render with the corrected wineglass. Yay!

#11

Lovely clean render - any tricks to your glass setting :slight_smile:

James

#12

Yes, this is a nice composition and I second James request… Glass settings please :slight_smile:

#13

Thanks for the compliments!

My glass settings are pretty basic. I guess one thing I do that some people don’t is modify the Reflectivity Edge Controls to make the glass reflective along the edges, but basically not reflective where the glass faces the camera. It’s how glass really behaves.

Other notable tweaks might be that I have the wine reflectivity set at zero, and I very slightly scaled the wine object so that it actually penetrates the walls of the glass a bit — a trick I learned using modo. Really helps the realism, and avoids the kinds of artifacting you can get when two transparent surfaces are touching. I also like to drive the spec size up to 500.

Have a look:




I really do like to keep things as simple as possible. I suppose if the scene were against a brighter background I might have used a little edge transparency falloff too, but I think it would have made the glass too dark in this scene, plus it requires using a dark glass color and that complicates setting up the other controls a bit.

#14

Yeh, Me Too!

#15

Just posted them — like three seconds before you commented. Ha.

#16

Yessir!, I hope readers of this forum realize that my post saying ‘me too’ was me chiming in with the others about wanting to see your glass setting. Beautiful image!

#17

Thanks Mark for taking the time to post the glass settings with image grabs and all. This is very good information. :beer:

#18

Yeah, this was really well done!

#19

Hi Mark,

Excellent jobs. You brighten my day!! Keep them coming. May be this forum will now be kept alive with WIP for learning and exchange of ideas and tips whereby EIAS3D is more for software centric issues and communicating with the developer.

Just my two cents why this forum should stay alive. :bounce:

Burney

#20

Just adding my thanks on your posting of the settings - I, even as a long time user of EI, find myself getting lost in the myriad of settings you can mix and match. When I see something that looks as good as your render Its invaluable to find out what the settings are. Thank you.

Of course the other nice thing is when you see one setting that looks good it looks so simple :slight_smile:

Cheers

James