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VS3D Region Mode
1.4.2 Region Application.
All of the "Define/Modify Region" operations affect only the region itself. They do not, in any way, affect the sculpture surface. The region, however, can be used to directly modify the sculpture surface via the "Apply Region" operations.
"Sculpt" : This drop-down menu contains functions for using the current region to modify (sculpt) the sculpture surface. The outcome of these operations depend upon the region application mode and the "Feather" setting. Most also utilize the region "Z" height setting. All operations are performed on the current layer only.
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"Plateau" : This will apply a flat plateau to the sculpture surface. For example, if the region application mode is "=" and the region "Z" height is set to 1, then a plateau operation will cause all the sculpture surface heights (on the current layer) that are within the region to be set to a height of 1. If the "Feather" setting is greater than 0, then the edges of the plateau will be blended (sloped).
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"Bulge" : This is similar to "Plateau", except that the profile is rounded and not a flat-top plateau.
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"Chisel" : This is similar to "Bulge", except the profile is ridged - giving the appearance of chiseling.
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"Fill" : This operation will take all the height values around the edges of the region and use them to interpolate new surface heights. This is useful, for example, to fill a "hole" or to repair other types of defects in smooth surfaces.
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"Ramp..." : The "Ramp" operation is similar to "Plateau", except that the surface of the plateau is sloped. The "Apply Region Ramp" dialog has one field for setting the XY "Ramp Direction Vector". For example, a vector of 1,0 will case the ramp to slope up in the X direction. The resulting ramp will have a height of 0 at the left edge of the region, and the height of the right side of the region will come from the current region "Z" height setting.
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"Smooth..." : The "Apply Region Smooth" dialog has one field for setting the width of the smoothing neighborhood (in grid cells). The larger the number, the greater the degree of smoothing. The smoothing is applied to all areas of the sculpture surface within the current region. This is similar to applying a hammer blow in "Smooth" mode (except, of course, that the smoothing is applied across the entire region). The region "Z" height setting has no effect on the "Smooth" operation.
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"Sharpen..." : The "Apply Region Sharpening" dialog has one field for setting the width of the sharpening neighborhood (in grid cells). The smaller the number, the more localized the sharpening. A small (localized) setting is generally more desirable. The sharpening is applied to all areas of the sculpture surface within the current region. This is nearly the opposite of the smoothing operation. The region "Z" height setting has no effect on the "Sharpen" operation.
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"Flip Vertical..." : This function will flip the surface heights within the current region top-to-bottom. The "Apply Region Vertical Flip" dialog has four settings. The "Pivot Axis Placement" setting is used to specify the coordinate system - Grid Units or Data Units. The "Pivot Position" specifies the Y coordinate about which to flip the surface. The "Backfill Mode" along with the "Backfill Plateau Value" specify what Z height (if any) to fill the vacated areas of the surface (if any). It is possible for flipped surface elements to end up outside the region.
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"Flip Horizontal..." : This is similar to "Flip Vertical...", except that the surface is mirrored side-to-side.
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