Minus 3D Analyst tool - interpolation method?

ThomasL

I use the Minus 3D Analyst tool to compute the difference between two DEM raster models.

The cell size is 0.5 m and 0.4 m. I use the "arcpy.env.cellSize" to define the cell size to 0.4.

My question is: What interpolation method does the tool use?

I hope it bilinear interpolation, but often the nearest neighbor assignment resampling technique is used.

Please help me finde the dokumentation for this 

DanPatterson_Retired

When you ran the tool, you can check the environments setting in the Environments tab  what did you set it to or did you check?  Alternately, resample first, ... minus with the appropriate matching files with the correct cell size just to be extra sure.