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How to show one 3D shape inside another one.

Posted By:      Posted Date: October 18, 2010    Points: 0   Category :WPF

I am trying to show a 3d shape inside another one. I already set the opacity of DiffuseMaterial.Brush for outside shape as 0.1, but still can not see the inside shape through the outside one. Here is my codes, anything wrong?

<Viewport3D x:Name="Viewport3D" ClipToBounds="false" Width="400" Height="500" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:c="http://schemas.openxmlformats.org/markup-compatibility/2006" c:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008">
   <MaterialGroup x:Key="MaterialMR1" >
      <SolidColorBrush Color="#FFFFFF" Opacity="0.1"/>

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