/ |
Selection |
Mask |
Blocking filters |
Yes |
Yes |
Blocking tools |
Not yet |
Not yet |
Partial blocking |
No |
Yes |
Other shapes than rectangle |
No |
Yes |
Moving pixel contents and "floating" |
Yes |
No |
Pasting to / copying from |
Yes |
No |
Another difference between selections and masks is that when a filter is applied to a selection, only the pixels in the selection affect the filter. When a filter is applied to a mask that has the same shape as the selection, all pixels of the whole image can influence the result of the filter (even if only the pixels allowed by the mask are affected by the filter). This effect can for example be seen with filters such as Flip X/Y, Random Shuffle, Fourier Transform and Gaussian Blur.