I've noticed several issues concerning to "Ground shadows" in KeyShot 2.1.21(WinXP32bit).
- Material type "Solid Glass" can't project right ground shadow...always dark!
- Material type "Glass" has possibility of projecting right(pale) ground shadow,
but needs drag-and-drop operation from Materials Library...
...in another words, when double-clicking object and changing Material to "Glass"
on Option window, the object still projects dark shadow! - Changing transparency of Material type "Glass" can't change darkness of
ground shadow dynamically...needs save and re-open bip file, then refreshed. - Once getting pale ground shadow by Material type "Glass" with drag-and-drop
operation, the object still project pale ground shadow after changing Material type
"Glass" to another opaque material on Option window.
But saved and re-opened, ground shadow is refreshed/matched to opaque material. - Once Labels mapped with Material type "Glass", the object projects dark ground
shadow when re-open the bip file.
...yeah confusing and complex a little, so I attached several images and
sample bip file.
In test_101023_01.png:
Box#1 and #2 are same setting as 100% white "Diffuse" material.
Plate#1 is "Glass" material (two sided), and plate#2 is "Solid Glass".
Box#2 is bright nearly same as box#1, but the ground below plate#2
is dark...looks failing to catch the light through plate#2.
And, plate#1 has a label but keep transparent for ground at this time.
In test_101023_01.png:
Once saved and re-opened the bip file...plate#1's transparency for
ground is lost...plate#1 projects dark shadow same as plate#2.
(But in case of no label on "Glass", transparency is sustainable after re-opening.)
In test_101023_03.png:
Plate#1 is set as "Glass" by drag-and-drop operation from Material Library at first.
Then double-clicking plate#1 and changed to opaque material.
But plate#1 is still transparent for the ground.
In test_101023_04.png:
Once saved and re-opend the bip file...irregular transparency of plate#1 has gone.
...hmm, interesting but strange behaviour :-[
Thanks in advance,
kyosen
We will check into this. 2 things, though.
- Make sure that you check "two-sided" when using the "Glass" material
- Check "Ground indirect illumination" in order for glass not to cast a shadow.
In addition you want to increase the raybounces so you get rid of the blackness in the glass.
Thomas