[Becco_UK]

deadalvs: I tend to agree - if a gap is introduced between the glass container and liquid, it can no longer be deemed to be pysically correct. That said and for the purposes of 3D rendering I suppose compromises are required. The method used by KurtS looks to be a good representation.

[Maximus3D]

One more sss test, perhaps a better one.. i don't know. This is the old styrofoam material with displacement and sss. And you can see it uses sss because the sss-bars are visible through the surface.

[Edit] : Updated renderings added, if these are also incorrect please let me know and i will remove them.



/ Max

[Thomas An.]

And you can see it uses sss because the sss-bars are visible through the surface.

Actually that is not good. If you see the bars well defined, it means the SSS is too weak. You are probably using too much absorption and not enough scattering (which is not much different than using a pure dielectric to begin with)

[Maximus3D]

I understand Thomas and i will try to redo it again and see if i can improve it. If i'm successfull i will add the images again in my post above. Thanks for your feedback, that was stuff i did not know before.

/ Max

[KurtS]

PS: There are some stripes evident here (on the right hand side):

hmm... there seems to be something wrong with my model. I'll have to do some more testing.

[Thomas An.]

Great, now we *can't* get the lines ...
It is hard to do it by looking in a photo though.

The best is to use a thick water glass from your own kitchen so as to better judge thicknesses. I have found out in the past that even if you hold the glass in your hands it is still hard to determine the inner surface of it ... and if you misjudge thicknesses at its bottom, the Maxwell "look" will not be the same as in your control photo.

What you can do is:

a. <Fill up> the glass to its rim with something that hardens in the refrigerator (I don't know ... maybe water and let it freeze ... or use butter) ... or just play-dough. Once it has the shape of the cavity take the ice out ... and this will give you the outline of the inner surface.

b. place the ice and the glass side by side and take a side view photo of both (at a large focal length to minimize perspective)
This will give you the outside outline and the inside outline with a fair amount of accuracy.

c. The two outlines can be used to model the glass.

Short of a poor man's digitizing ...

[Hervé]

a. <Fill up> the glass to its rim with something that hardens in the refrigerator (I don't know ... maybe water and let it freeze ... or use butter) ... or just play-dough. Once it has the shape of the cavity take the ice out ... and this will give you the outline of the inner surface.

...

ice won't work.. but any king of jelly jell-o will work.. (triple the usual Jell-Y dose, so it won't wobble too much..

[KurtS]

...or simply just break the glass?

[Hervé]

...or simply just break the glass?

you might hurt yourself and the ice might broke as well...

But if you do want (or need) to break a glass, then maybe plaster..?

[Thomas An.]

ice won't work.. but any king of jelly jell-o will work.. (triple the usual Jell-Y dose, so it won't wobble too much..

Jelly will do ... but ice might be good too. Why not ... if you run some gold water on the glass afterwords (careful not to crack it), or let it sit a little, the ice eventually will slip right through.

[leoA4D]

For the inside/outside profile, how about a warm, dry and uncooked method such as calipers? http://images.google.com/images?hl=en&q ... ages&gbv=2

[Thomas An.]

For the inside/outside profile, how about a warm, dry and uncooked method such as calipers? http://images.google.com/images?hl=en&q ... ages&gbv=2

Tried it a while back ... and it's a bit of a pain. It sounds accurate but in practice it is not. You have to sample so many points at different depths and each time you have to measure not only thickness but also height (and do so simultaneously which is impossible unless you get a marker and draw points on the glass) and you still can't get a good representation of the inner bottom (and how round or square it is which plays an important role in the final look).

[Bubbaloo]

Keeping this thread alive...

Early test: grass and leaves with new sss.
Tree on the right has no sss for comparison.

[Bubbaloo]

...And a render from a different time of day:

[Miguel Piñón]

It´s possible with the new SSS system make the single shit SSS like in the other engine??? For the leaves of trees, etc....... planes with no volume?

Thnx!
Mike

Sorry my english!