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A lot have been improved in the 3D Analyst 10 including the ability to export large scenes as large 2D images. However, some problems still exist one of which is: When I export a scene that contains a very large TIN the resulting image appears to have some triangles shaded darker which causes a "spotty" appearance. It's almost as if some "faces - triangles" were shaded incorrectly, or reversed?
My current graphics card is NVIDIA Quadro 4000. (Used to have the NVIDIA Quadro FX 1700 which caused similar issues with the 9.3 version of 3D Analyst) I should also mention that it does not matter what type of image i export, compressed or not the result it more less the same... Does anyone have any ideas as to how to rectify this?

EDIT/ UPDATE: It seems that this is only happening when the TIN is exaggerated, in this case 5x

EDIT/UPDATE 2: If i drape imagery over the terrain and turn the IN off, there are no issues. This problem pertains only to the display of TIN Arc Scene screen capture: alt text

Exported Image (jpeg) alt text

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It looks like it may be an artifact of JPEG compression. Does the same problem occur with lossless formats such as TIFF or PNG24? –  Sean Nov 30 '10 at 18:57
    
Compression or lossless, artifact always show. –  Jakub Nov 30 '10 at 19:03
    
id recommend raising this via Esri Support. If they can replicate they should log a NIM for you. –  Simon May 15 '11 at 12:52
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1 Answer 1

One possible issue could be the rendering of the 3D environment. Occasionally anomalies occur in rendering 3D environments because the algorithm or technology used can not adequately determine how to do it, or because it has not effectively managed and causes undefined exceptions.

Most of the rendering for 3D GIS data will break the information down into parcels to provide faster rendering, occasionally anomalies occur along the joins of these parcels. Google Earth has them if you look closely, you can see seems in the data set when your viewing angle is changed.

I suggest you raise it with ESRI, but if you look at many 3D applications, artifacts in rendering are a part of life.

Sorry, no solution just a possible explanation.

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