Help! Realistic wine glass

I’m trying to make a realistic wine glass according to a Brasil/3dmax tutorial.
As you can see, the 3dmax version looks very realistic, while my pathetic attempts
got me nothing than a wine glass with render artfacts and unrealistc reflections.
One thing I don’t understand though, is that somewhere in the forum I read that someone (I think it was the “bot” guy)
said that for a similar attempt it took about one hour to render. I have a 900 Mhz AMD and the standard raytracer took about a
minute and the AO took about 7 minutes.
My materials for the glass where full specularirty and hardness, and the raytrace parameters: full reflection, a little Fresnel
1,15 IOR and no Fresnel at Transparancy.
I think that Blender should distinguish between hollow objects and massive objects.
In anyway, do you have some tips to better my attempts?

1 pic = 3dMax
2 pic = Blender raytraced
3 pic = AO
http://home.wanadoo.nl/toontje/final.jpg

http://home.wanadoo.nl/toontje/wineglass.jpg http://home.wanadoo.nl/toontje/wineglass_ao.jpg

You should first make the glass a little bit thinner and the edges more round.

Look at this webpage:http://www.blender3d.org/cms/Rendering_options.33.0.html

Next optionaly give it something to reflect, and render with yafray:)

check your IOR Glass is higher I believe like 1.5 or something like that.
And I agree Yafray would be a way to go. Also full reflection seems too much.
It’s been a while since I did glass so the above is off the top of my head.
Paradox

Well, thanks for the tips guys.

1: The glass is as thin (not the handle though) as it comes. It may look to have an edge, but that is faked. When drawing the profile, I didn’t make the container part of the glass doubleside. I added just a rim on the edge. A double sided glass will have ugly reflections and ugly hollow material like appearance

2: I know that rayfray kicks almost everybody’s ass. But I wanted to do it in Blender, to explore the possibilities of blender.

3: I have reflection objects on the glass. The white band on the right is a reflection from a shadeless plane just outside the camera view. The glass is surrounded by this objects, but you see only on reflection because of the Fresnel. Otherwise you could see the other reflection that is more on the front, but the glas will appear less transparent (or not transparant at all).

There is even a angular sky map, but the effect is very subtle. Maybe I should post the Blend file.

Yes posting the blend might help.

The fact that it is not double sided could be your problem. Have you tried rendering with it double sided? I’m not sure if that is the problem but give it a try.

What is your index of refraction? I don’t see much warping there.

The real superiority of 3DSMax is in the model, which is much better.

1- Glass MUST contain a volume. I mean the ‘container’ must have a volume enclosed by a manifold surface. No tricks please, or it won’t work :slight_smile:

2 - Inner and outher surfaces of the cup must not be parallel this is more realistic and gives nice refraction effects

3 - Be sure that the level of ref/trans rays is high enougth. For a well formed glass, at the very least must be 4

4 - THe 4DSMax has a better environment! Use one

Stefano

The fact that it is not double sided could be your problem. Have you tried rendering with it double sided? I’m not sure if that is the problem but give it a try.

1- Glass MUST contain a volume. I mean the ‘container’ must have a volume enclosed by a manifold surface. No tricks please, or it won’t work :slight_smile:

I think they are right. You should make it double sided.

:stuck_out_tongue:
Thanks guys! I used your tips right away and this is the result.
I’m must add that I’m not 100% sastified… well 95% maybe. But it sure looks very similar to the 3dsmax render. The part of the parallel walled container did it I think. When drawing the profile, instead of tracing down manualy at the container part, I shift + D the outer wall and translate it inwards. So the container part has parallel walls. I corrected the IOR too and made it 1.5. And some more tweaks here and there. I know it could be made better, but I won’t spent the time just for that last 5%.
I included a zip file too with my prior attempts.
1st pic = internal raytracer, 2nd pic = ao

C&C please

http://home.wanadoo.nl/toontje/wineglass_revised.jpg http://home.wanadoo.nl/toontje/wineglassao_revised.jpg
http://home.wanadoo.nl/toontje/prior_attempts.zip

last one looks pretty good. I think a proper scene would add the nessesary reflections and really make it look good. The cdsmax has many reflections, and thus looks good. It is also thinner and has a higher sampling count. On a better renderer.

i know this thread is old, just wondering if i could get the .blend file.

glass is pissing me off right now LOL

Alltaken :smiley: :smiley:

really glass isnt too hard to make,
just a few important things:
thickness, looks like crap without it
needs reflection, but not too much
ior should be between 1.5 and 1.6
and also you must have an environment
good luck on your glass

His model isn’t as nice as the 3DSMax one. For instance his glass is thicker at the top, and squared off. The 3DSMax model is tapered crystal, and has a rounded edge which results in much nicer reflections.

cough yafray cough

it got everything you need.

Here’s my attempt:

http://www.hamsterking.com/blender/3d/classinaglass.jpg

and here’s the complete file for Blender 2.34 + Yafray 0.07 for study
if you can have any use for it:

http://www.hamsterking.com/blender/3d/ClassInAGlass.blend

/JoOngle

ok did u model the table cause it looks as if the glass is flying lol. looks very cool (the cup).

hehehehe…

:expressionless: forgot to put the shadows back on …

Anyway…rendering a better version right now, will post both the image
and the file right here:

ok dude

A better version of the above - but with limited raydepth (hence the overlapping darkness on the 3 glasses):

http://www.hamsterking.com/blender/3d/classinaglass2.jpg

The file for your study pleasures:

http://www.hamsterking.com/blender/3d/ClassInAGlass2.blend

Just increase ray trans depth for increased depth if you have overlapping
glass like this. Oh and one last thing…this file takes forever to render
(took me 1 hour with Yafray on a portable 1.33 ghz Mac powerbook)
so I’m not rendering it again :slight_smile: but the file has been provided for your
pleasure. Enjoy.

/JoOngle