Yes, MRIcroGL 1.2 uses the cubic interpolation algorithm described here:
  https://github.com/DannyRuijters/CubicInterpolationWebGL
This is enabled by moving the `Q`uality slider in the Render panel to either the left extreme or right extreme. You can use the preference option to set a default setting for this slider. There are six settings:

 0 = adaptive: poorest during interactions, best during pauses
 1 = poorest
 2 = poor
 3 = medium
 4 = better
 5 = best (cubic interpolation)

The computational cost for cubic interpolation is high, so I would only use it if you have a dedicated graphics card or are working with low resolution images.