Can anyone tell me how to restore artistic and a couple of other filters into the filter menu. When I click on filters 'artistic, sketch and texture' are there but faded and I can't access them. In my preference menu 'show all filter groups etc' is ticked already. All the on line tutorials seem to say if this is ticked all filters should be accessible.

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Don't worry, just found out they only show up if I convert from 16 bit to 8 bit.