Just upgraded GeoServer to latest version (2.15). I used to apply bicubic interpolation method to render some WMS basemaps in the previous install (v 2.10) but now when displaying the same maps, odd colors appear because of the interpolation.
Here some examples:
The colors are Ok when I use other interpolation methods (e.g. Nearest Neighbor). However, I still want to use Bicubic because results were better when I used it in the previous install.
There have been other changes because the host server has been upgraded as well, so for example the new server runs Java 11 while the old one ran Java 8.
Are there any modifications that I could apply whether in Geoserver or in Java (or anywhere else) so bicubic interpolation provides good results?