opacity3D Library Method
Short Description: Set opacity of 3D surfaces
Signature: x.opacity3D (f[,t])
Class: taccgl3DObject Class
Sets the opacity of the 3D Object. f must be a value in the range 0 ... 1, whereby
1 means fully opaque and 0 fully transparent.
If t is given, the same rules apply. Then there will
by an animation performed animating the opacity from f to t.
This value does not apply for surfaces that are UV Mapped or for the HTML material.
For these surfaces the inherited Light and Shadow methods of the
Transition Class apply.
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