How to disable smoothing of raster display?

[swt-gis]

I want do display a raster file (*.tif, GeoTiff) in AutoCAD Map 3D 2016. The size is 25 x 29 Pixels.

The original file looks like this:

AutoCAD Map uses an automatic smoothing/softening:

 

But I want, to see the squared pixels and not the smoothed display. How can I disable the smoothing?

[swt-gis]

I have found for me a different solution:

I converted the raster to vector polygons. An additional advantage for me: I can label the values.

[swt-gis]

Although I have found a workaound in this specific case, I am still interested in knowing whether it is possible to switch off automatic smooting of a raster.