Raster bender issues

[misogir]

Hi,

Raster Bender is a great tool, doing exactly what I need. However I come across couple of issues:

1. Constrains layer doesn't seem to work properly - I am not able to use constrains layer, to get rid of unwanted triangles. The layer is either doing nothing, or modifying triangles in unexpected and unpredictable way

2. 1 pixel shift along the edge of the transformed area - all my transformations end up with a one pixel shift along the outer edge of the transformation area (no matter what the buffer is)

3. There is some sort of noise introduced into the image in the buffer area, resulting in the reduced quality of the raster. (please see the attached rasters)