Overlay

3DVIZ: Maps > Load Overlay File

This tool adds a Petra Overlay File (*.OVL) at a flat depth inside the 3DViz Module's cube. As an overlay file, various overlay layers can be turned and off inside the 3dViz module. This tool can be a little more flexible than the Map Images tool, but can't display map data outside of an overlay file (such as attribute maps or data posting).

To modify how an overlay file is displayed:

Select the button on the on the Layer Toolbar
3DVIZ: Maps > Load Overlay File

Overlay	Selects the overlay to display on the 3DViz module. By default, this tool looks in the project's Parms directory. To change the directory, select the Browse button and navigate to the desired location.
	Opens the Overlay Layers and Preferences tool. Here, you can enable and disable different overlay layers. Note that the overlay file here is read only - though you can clear layers and change plotting order, these changes will not be saved back to the overlay file.
Opacity	Sets the opacity of the overlay file between 0 (transparent) and 1 (opaque).
Place Overlay At:	Fixed Elevation - This option sets the depth (in SSTVD) to draw the overlay file. "Top" button sets this depth to the highest datum in the project, while the "Bottom" button sets this depth to the lowest TD in the project)
Well Symbol	Adds well symbols to the overlay file
Browse	Sets an additional filter for t
Symbol Size Factor	Sets the size of the symbols on the overlay