I need help with making realistic glass

[leigh]

Firstly, a tip - change your lighting! You should never have black shadows in a scene, as that cannot really happen in reality if there is any light around. Changing your lighting will definitely improve both the quality and the mood of your image.

Secondly, one thing you seem to have forgotten about is refraction. Anything that is transparent refracts light, and it doesn't look like this glass is refracting anything. Glass has a refraction index of 1.5 :)

Something very important is that you must ensure that you are using transparency and not opacity. This may seem a bit silly to say, but the 2 effects are different.

One of the trickiest things with glass is to give it the appearance of it being solid. It looks like you have modelled the inside polys here, so you aren't having too much of a problem with it, but it still seems to be lacking substance ever so slightly. What software are you using? There is an excellent shader for Lightwave, called Coffee, that simulates thickness for transparent objects. If you use LW, check out.... although, I don't think this looks like it was done in LW. It looks like Max - am I right? Try looking for a thickness shader of some sort for whatever software you are using.

You need to bring up your gloss amount a bit more. The way the light is falling on it at the moment would seem to indicate that it is sand blown glass, which wine bottles are not. Glass is very glossy, so pump up that value ;)

You also need to make it more reflective, as it doesn't seem to be very reflective right now. Remember that with transparent objects, you need to keep in mind the Fresnel effect - basically, as the angle that you view an object at increases, the reflectivity decreases and the transparency becomes more apparent, and vice versa. Basically this means that at the edges of your bottle, where the glass slopes away from our angle of vision, the glass will appear more reflective, and less transparent.

To tint the glass... well, I'm not sure how you'd do that in Max (if you're using that). You need to find some kind of "colour filter" option that will allow your object to retain a rich colour while remaining transparent and glass like.

To put a label on it, I'd recommend actually wrapping some polys around the bottle and using those as a label :)

On another note, it looks like your bottle isn't sitting properly on the table - it appears to be floating in the air... It may just be the angle of the render though :)

Also, check your render settings - the shadow cast from the bottle shouldn't be solid.

[civicRacer95si]

The program is max 4.2 I am going to check out if there are any scripts to make the glass look solid and to tint the glass thanks for all your advice I am going to tweek some things and repost the image soon:buttrock:

[civicRacer95si]

Here is what I have so far I messed around with the glass texture a-lot and have been trying to get the liquid inside the glass to look good. Sorry about the background it is not staying long:)
I was looking at a wine bottle and The glass is green and the liquid is dark red I am trying to simulate this look with my wine bottle but cant seem to get the bottle and the liquid to be as clear as the real thing.
Overall what do you think about the glass? Too reflective? not enough. Just let me know:)
Thanks again, Luke.

[Max4U]

Lost the tutorial link, but I think it is done this way:

1. Make the glass shape first with spline. Now without selecting "new shape", create another poly/spline that will be the liquid. Be careful that your "liquid" does not go beyond the outer edge of your "glass".

2. Subtract the "liquid shape" from the "wine glass" shape using boolean operation. Make sure you have a temp file of liquid.

3. Merge the liquid spline. Lathe.

4. Assign raytrace material to glass. IOR = 1.5

5. Assign raytrace material to liquid, IOR = 1.33 for the top face:
<1 for the rest.

[vfx]

In relation to leigh

There is a free plugin called "solidify" for max that does excatly what she is talking about - thickening - It's a great tool! Just search for it on yahoo.

[dark_lotus]

With the wine, it should also behave like glass, althought the refraction value is 1.3

What it seems to be lacking is what is reffered to as the 'Fresnel Effect' (pron. Frenn-ell (french)).

Basically as you look straight at it, it is completely transparent and has no reflection. As the angle in which you are looking at it increases (up to 90 degrees) the transparency decreases and the reflection increases.

I can post a diagram if that didn't make sense.

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