Drillhole assay data can be displayed using a few different methods depending on your needs. For a quick visual display, use the Plan Map tool with shapefile output and the post values option for assay fields in the Data tab. The point shapefiles are not Z aware, but you can use the RL field as your base heights in ArcScene.
If you prefer to have a more realistic polyline that shows sample interval lengths, you can use linear referencing. Traces from the Plan Map tool are Z aware polylines that can be turned into “routes” and used to display from-to assay data. Use the Hole field for the Route ID, and Top and Bot fields as measures. Then export the attribute tables of the assay point shapefiles (created as posted values in the Plan Map tool) as DBF tables and use them to create Route Event Layers where the From and To fields are the measures. These route events can be displayed and symbolized in ArcScene.
Linear referencing can also be used to display assay information on 2D sections maps with ArcGIS symbology applied. Just use the 2D Traces shapefile created in the Section Map tool instead of the 3D Traces shapefile from the Plan Map tool.
Although ESRI does not currently support a voxel datatype, the voxel data created in Target for ArcGIS can still be displayed in ArcScene. Export your voxel model to an XYZ text file using the Voxel menu option "XYZ from Voxel". Then convert the XYZ points to a shapefile or feature class using the Add X,Y Data tool. In ArcScene, add your point feature layer and symbolize the data using 3D cube simple marker symbols. Set the symbol size to the original voxel cell size so the resulting cubes are the right size.
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