Colour Surface by Polygon

Source file: colour-surface-by-polygon.htm

Colour surface by polygon is a function allowing you to use the projection of a polygon to apply a colour to a surface. Different methods of projection are possible to accurately define the region.

Note:  To exactly colour the region inside the polygon, duplicate points will be added which will produce an inconsistent surface.

Note:  Ensure the surface is not in photographic display mode, otherwise the surface display will be impaired. Use the Surface Appearance selector to set the surface to anything other than photographic.

1. Select the surface to be coloured.

2. Select the polygon to be used as the boundary.

3. On the Labs ribbon tab, go to the Geological group and select Colour Surface by Polygon.

4. If the Polygon and Surface fields do not auto fill, drag the objects to their respective fields or manually type in their names.

5. Select the colour you want to project onto the surface.

6. Select the Blend factor. This will dictate to what degree the colour will mix with underlying colours.

• Two points: Define the direction by specifying two points.
• Facet: Make the direction perpendicular to a selected facet.
• Axis aligned: Define the direction by an axis of the view window.
• Bearing and inclination: Define the direction by a bearing and inclination angles.
• Action plane axis: Define the direction by an axis of the action plane.

7. Fill in the remaining fields appropriate to the type of projection selected (if required).

8. Click OK or Apply to complete the process.

Example with wrong surface setting - photographic surface displayed.

Example showing different coloured regions from different projections.

Example of Bearing and inclination projection.