Selection contains semitransparent pixels in it.WTF I'M DOING WRONG?-go channels-pick the one which has most contrast between the thing I'm about to select and background-ctrl+l and move sliders till get b\w image-copy area to new layer-everywhere semitransparent areas.Is this method of quick selecting is broken or I am using it in wrong way? P.S. I'm trying to cut out part of screencap in png.
non-transparent pixels in the original are being kept as transparent pixels in the new layer, right?that means photoshop is doing a "fuzzy selection". turn off any setting that has to do with "fuzzy", "feathering", or "aliasing".(I don't use photoshop, so I'm not sure what you mean by black/white slider but I hope this helps)