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POWPF 3D transparent textures - clipping?
 

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  1. POWPF 3D transparent textures - clipping?
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    <p><a href="http://www.youtube.com/watch?v=gZNdfVwkttM" rel="nofollow">http://www.youtube.com/watch?v=gZNdfVwkttM</a> - you can see all of the problem described on this video if you can't see pictures.</p> <p>All of walls in all images below have a semitransparent PNG texture. Each square wall, floor and ceiling tile is a separate GeometryModel3D (I know that is no good for performance but...). The floor and the ceiling of the central cube have no any geometry and textures - so they have a color the same as Window.Background (black). But the effect considered appears in any way of transparency obtaining: texture for ImageBrush with transparency, Material.Color (for example DiffuseMAterial.Color) where Color has alpha channel, ImageBrush as material where ImageBrush has Opacity - all the way I have the same problem.</p> <p>All of walls consists of two triangles. Where are no explicit normals , because I define triangle indices so normals culculated automatically by WPF.</p> <p><a href="http://imagepost.ru/images/i/ma/image00001.png" rel="nofollow">http://imagepost.ru/images/i/ma/image00001.png</a></p> <p>It also haven't any back material or extra triangles from the back side.</p> <p>As you can see there is no problem if you look only from +Z to -Z (standing on the blue square and looking to the red square - that is the second picture).</p> <p>But if you look backward (from red to blue - the first picture) there is no transparency!</p> <p>Well, I desided to look from the yellow square (third picture).</p> <p>And then I walked nearer - you can see what was happening (pictures from 4 to 6).</p> <p>There are no geometry construction error or texture mapping error or lighting error! It is some kind of clipping, I guessed! In addition there are some interested pictures 7 and 8 to prove my guess.</p> <p>The last picture shows the white background of the window that hosted Viewport3D (previous was black), and my guess about clipping confirmed - WPF just not painted this part of the scene and we can see the window background!</p> <p>BUT! If this happens from various looks, why the look from +Z to -Z (second picture) seems well?!</p>
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    1. COAdditional images: http://imagepost.ru/images/i/ma/image00003.png http://imagepost.ru/images/i/ma/image00004.png http://imagepost.ru/images/i/ma/image00005.png http://imagepost.ru/images/i/ma/image00006.png http://imagepost.ru/images/i/ma/image00007.png http://imagepost.ru/images/i/ma/image00008.png http://imagepost.ru/images/i/ma/image00009.png
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    2. COI found this http://stackoverflow.com/questions/943067/wpf-3d-textures-with-alpha-channel/6331933#6331933 Can the Z-order be the reason of this WPF behavior? And how to escape this?
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    3. COHi there, in getting 403 access denied (forbidden) on all images. Also if I were you, I'd edit you answer to remove swearing before an admin down votes you
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