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webshot
09-29-2004, 06:46 PM
I need help with the texturing of this bottle. Actually a little push in the right direction. Modelling it was easy and I am going to research how to put on the labels. But one thing I was unable to find is how to make the bottle look thick and look like it has fluid in it. SplineGod mentioned he is doing a series for Kurv on this precise topic, so hopefully he will chime in. But if anyone can help I would greatly appreciate it. Also any render tips would be great. It has to be photo real (or as close as I can get it). May trot down to Barnes and Noble and see if they got Leighs book in on texturing.

Serif
09-29-2004, 07:38 PM
What you need to do is apply a glass texture to both the inside and outside polys of your bottle. The canned LW glass textures work sort of okay. However, I strongly recommend creating your own textures. For my glass... and I'm going from memory here... I apply a gradient to the transparancy, reflection, and color channels. The transparancy gradient is reversed. (more opaque to the side of the bottle and see-through towards the center) Apply the gradients on the incidence angle.

So... my basic texturing technique is to...

1. model
2. apply "glass" texture
3. copy polys and flip
4. apply "glass-to-air" texture
5. paste over
6. optional merge points

Be sure and turn on "raytrace backdrop only" for glass-to-air texture. Also, be sure and tweak the glass IOR (index of refraction) to whatever... and leave glass-to-air as 1

Again, I'm just going from memory, but this is basically a good technique for creating glass or clear plastic-like materials.

I have some good images below... sorry to say you may have to register to view them.

http://www.cghaus.com/forums/attachment.php?attachmentid=125

http://www.cghaus.com/forums/attachment.php?attachmentid=124

http://www.cghaus.com/forums/attachment.php?attachmentid=127

webshot
09-29-2004, 10:31 PM
Many thanks your glass looks good. Does this technique also work to make it appear as if there is liquid in the bottle.

Thanks

Padmus
09-29-2004, 10:45 PM
To make it look like there is liquid you need to actually model in some liquid ploygons, a nice way to do it is just take some of the insid bottle polygons flipem and add some sort of a top to the liquid, then you need to texture the liquid for which i suggest you use either thickness gradients or download coffee a plugin you can find on www.flay.com (http://www.flay.com)

rrelitz
09-30-2004, 07:40 AM
Liquid Arts has a great tut for you

http://www.liquid-arts.de/techniques.htm

click on the jack d bottle

LFGabel
09-30-2004, 08:14 AM
Just remember to use a glass-to-liquid surface where the liquid is in the bottle, instead of a glass-to-air surface.

webshot
09-30-2004, 04:00 PM
Liquid Arts has a great tut for you

http://www.liquid-arts.de/techniques.htm

click on the jack d bottle
Yea I found that tut ast night and dont know how...lol. After I finish I was going to post my results along with the tut. But thanks all. Lets see how I do.

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