opacity problem

[Lisa Sobierajski Avila]

Hello Ziji,

VTK does not sort/split polygons and order then in the correct 
back-to-front order. Therefore transparency is not correct and will look 
strange from most viewing directions.

Lisa


At 10:45 PM 5/18/00, Ziji Wu wrote:
>Hi, there
>
>When I load a half transparent actor in a render window, I frequently
>observe a kind of inside-out illusion while I am rotating the object around
>a specific angle. I guess it is because of the two sided lighting, i.e.,
>when the light facing the surface does not reflect too much because of the
>transparency, the light from the other side illuminates the back surface,
>which makes the back surface brighter than the front surface. Is this true?
>How can I solve this problem?
>
>Thank you very much!
>
>Ziji Wu
>PhD Candidate
>Mechanical Engineering Department
>Worcester Polytechnic Institute
>100 Institute Road
>Worcester, MA 01609
>Office: (508) 831-5976
>wuzj at wpi.edu
>
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