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How it Works
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Initial model
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Scene size: 2.65 MB (uncompressed)
0.65 MB (compressed)
Number of triangles: 74522
Number of shapes: 33
Note: a VRML model is available in the Examples section.
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Preprocessing
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Perform preprocessing by choosing Preprocess Model from the Action menu. During preprocessing, abutted shapes with the same material are joined to the single shape and closely spaced vertices are combined.
Note: It is strongly recommended to preprocess the model before optimization.
Number of shapes:
Before preprocessing: 33
After preprocessing: 27
Number of vertices:
Before preprocessing: 40244
After preprocessing: 39859
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Optimization
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Select the shapes to be optimized and start the optimization process.
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Set the maximal reasonable Optimization ratio.
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Optimization in progress
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In accordance with chosen settings, IMO generates an optimization database of polygons to be removed.
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Tune Optimization Ratio
Excluding shapes from optimization process
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As the destination optimization ratio for various shapes can be different, you can gradually exclude shapes from the optimization process. Drag the slider in the Choose Optimization Ratio dialog to the right until all the selected shapes look correct in the 3D window, then deselect the shapes you do not want for further optimization, and so on.
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Close the Choose Optimization Ratio dialog to complete optimization.
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Converting to splines
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You can convert a polygonal model to its spline representation in order to improve the surface quality.
Note: Spline representation is only supported by ParallelGraphics' Cortona VRML client, other VRML browsers will show it as a polygonal model.
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Crease Angle Tuning
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Tune the crease angle for selected shapes to achieve a smooth look.
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Drag the slider, or enter the crease angle value in degrees, then click Apply to preview the result in the 3D View window.
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Editing
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Finally, you can clean up the optimized model by manual editing. IMO supports three editing modes: shapes, edges, and vertices editing.
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Edit Vertices
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The Edit Vertices mode allows you to add, delete and move the vertices.
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Publish a model
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Publish the finished model. IMO creates a new folder in which all data describing the model is placed. This sub-folder will contain the model's .wrl file and the other resource files - textures. After the folder is created you may upload the model to your Web site.
Scene size: 63 KB
Number of triangles: 7862
Note: a VRML model is available in the Examples section.
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