Auto Crop enables auto cut off the sides of the output image to remove blank space of the image. This function leaves about 3% of blank space at each edge.
When this value is unchecked, True BoxShot will choose for you optimal scale factor relatively to preview window. Check It if you want to define your own scale.
Scale value = 1.0 means that object will have exactly same size as on a preview window.
You can use resampling filters to enhance the appearance of output image. For example, some filters add a blurring or smoothing effect to an image, while others enhance the hard edges between different image areas.
Read more about Interpolation Filters
Pixel Softness defines the scaling of the area covered by each single pixel. Higher values gives more soft/blurry results. Lower then 1.0 values give more sharper output, but could produce aliasing and fuzziness.