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Culling Options Explained

In Blacksmith3D-Suite, culling is the process of omitting geometry from an action. The simplest form of culling is by backface, where any portion of the surface that is facing away from the viewport is omitted. Per vertex culling determines the visibility of each vertex. If a vertex is obscured by another portion of the surface, then it is be culled. Per Pixel culling, which is only used for painting, determines the visibiliy of each pixel on a texture map. Below, we will show a few examples illustrating the different culling options.

Intermediate Tutorials

Step 1. Select the None culling option and paint a brush stroke. Then view it from the side and see how the paint goes straight through the model.

Step 2. Undo the previous brush stroke. Select the Backface culling option and paint a brush stroke. Then view it from the side and see how the backfacing surface does not get painted.

Step 3. Undo the previous brush stroke. Select the Per Vertex culling option and apply a brush stroke. Notice how the hidden vertices were culled, and the paint fades smoothly.

This option is no longer recommended and will be phased out in version 4
Step 4. Undo the previous brush stroke. Select the Per Pixel culling option and apply a brush stroke. Notice how sharp the transition is between the culled surface and the visible surface.


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