Hi, the custom blurr filter is a very fine filter, it can be used to blurr as well to sharpen images. The way the parameter ranges have to be selected and the name that has been given to this "blurr" filter (it is a "band pass filter" gives me the feeling that the function of the filter has not been completely understood at affinity. I give simple examples: -1 in the upper left field and +1 in the lower right field (zeros elsewhere), offset is sharpening (high pass) filter emphasizing edges running at an angle of 45 degree. +1 in the upper left field and +1 in the lower right corner of the matrix (zeros elsewhere) blurs the image only in the direction of the diagonal line. The high pass version can be used to generate relief effects (see the results below achieved in photoshop). To remedy: Normalize is a dangerous non-necessary feature, as it could imply division by zero. Offset should add a color value to each channel between 0 and 255 (8 byte) to the matrix results. The examples here were achieved with PS: https://www.mapdesign.info/kontakt/example/
