Rick Measham <rickm*at%isite.net.au> wrote:
> Skip Talbot wrote:
> > Yeah except it happens twice.  The surface of the water is near the top
> > of glass, but the straw breaks midway down.  I'm guessing this is caused
> > by the IOR of the glass taking over at this position, probably do to
> > coinciding surfaces.  Notice the jagged patter to the left of the break,
> > probably the mesh (if it is a mesh) where the surfaces intersect.
>
> I thought that was due to the shape of the glass .. notice that at
> table-level the glass isn't a circle, but has corrugations. I assumed
> that these started at the point of the second break..
>
> > Also
> > notice, how the glass clips the bottom end of the straw unnaturally. Its
> > funny the things you notice when you give an image a second look.
>
> Once again, I think this is the same .. the corrugation near the end of
> the straw hides it, and so it looks unnatural.
>
> If the OP is reading this, can you comment? (And possibly post a version
> without the water .. (and I guess photons won't matter either :)))
>
> Cheers!
> Rick Measham



Ooo , Everybody are commented:)
I understand this mistake like Rich's topics. The surface of glass and water
are coincidet and suface problems or render bug. The glass model is made
from Mesh2 object. And  probably I wasn't calculate normals of surfaces
correctly. So I changed glass model to SOR object. And ior value  : water
:1.33 , glass :1.5  But this values are making different more effect in the
Beta.09. I must filled sor object.

I use point light, because the area light is very slow in this sample. I'm
posting two scenes (in povray 3.6 and 3.7 Beta.9)

How can I make filled solid glass or cuve vs object like the following
figure? (without the difference method)

This scene is rendered v:6, Because v:7.Beta9 is very slow...





Refraction Chart Index:

Material                Index

Vacuum                1.00000
Air                    1.0003
Cinnamon Cat            1.136
Carbon Dioxide, Liquid       1.200
Ice                   1.309
Water                 1.333
Acetone                1.360
Ethyl Alcohol             1.360
Sugar Solution (30%)       1.380
Alcohol                 1.329
Flourite                 1.434
Quartz, Fused            1.460
Calspar2                1.486
Sugar Solution (80%)       1.490
Glass                  1.500
Glass, Zinc Crown         1.517
Glass, Crown            1.520
Sodium Chloride          1.530
Sodium Chloride (Salt) 1     1.544
Polystyrene              1.550
Quartz 2                1.553
Emerald                1.570
Glass, Light Flint          1.575
Lapis Lazuli              1.610
Topaz                  1.610
Carbon Bisulfide          1.630
Quartz 1                1.644
Sodium Chloride (Salt) 2     1.644
Glass, Heavy Flint         1.650
Calspar1                1.660
Glass, Dense Flint         1.660
Methylene Iodide          1.740
Ruby                  1.770
Sapphire                1.770
Glass, Heaviest Flint       1.890
Crystal                 2.000
Diamond                2.417
Chromium Oxide          2.705
Copper Oxide            2.705
Amorphous Selenium       2.920
Dougbrainium            3.039
Iodine Crystal            3.340

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