Affinity Photo 1.10 - Live add noise filter - Merge or Rasterise removes some noise

[dcadint]

If I take an image and apply live add noise filter and contrast filter and then use either merge visible or rasterize to merge the image the resulting image ends up having less noise.  This happens whether the filters are in their own layer being applied globally or if I place them under the image as a mask or clipping layer.   I was kind of expecting the resulting image to look the same as my image layer with child adjustments looks.  

[walt.farrell]

Are you viewing the image at 100% zoom before and after you perform the merge?

[dcadint]

Yes, same zoom level before and after.  I think I see the issue.  If I apply the destructive add noise filter and adjust the slider to 50% and then when I close out the dialogue the image noise level decreases to the same level as the live filter after I merge visible or rasterize. So what I'm seeing with the live filters is like a rough draft.  However this can be a wysiwyg problem if what I'm seeing with a set of live filters may not be what I'm going to get in the end.  Must be a way to push a final image display calculation with live filters to see what I'm going to get in the end.

[walt.farrell]

1 hour ago, dcadint said:

Yes, same zoom level before and after. 

"Same" does not matter. Is it 100% zoom, or something else? You must evaluate it at 100% zoom (or possibly higher, 200%, etc.) to avoid issues associated with MipMap processing in the Affinity applications.

[dcadint]

Interesting Ok, I see at 100% the issue goes away but then I can't see the whole image and the filter/adjustment on the whole image.  Have to pan around