BillRB

Leigh, Thanks for the great reply. I watched the video (very helpful) and I'll give the Quick Mask approach a try. The other part you mentioned about saving as a Spare Channel is over my head at the moment so, I'll have to do some more reading first before I try that part. But, (hopefully) here attached is my work-in-progress affinity file of the picture I am masking. It is the tail sections which are the main challenge to mask tightly and in sufficient detail for a clean sharp edge. Phoenix for bill M1.afphoto

I am fairly new to Affinity and using it mostly for very very detailed masking of hi-res picture masking to create a simulated 3D object in a CAD program. I have two issues and questions: Is there a best or recommended way to select, in progressively detailed masks, the final selected portion of the original picture? If I did the fine detail masking all in one session, it would likely be something like 6+ hours to define it at the level I really need. So, I am currently doing it in progressive stages and sections. How do I keep the mask selection detail done at a very low level (3 pixel focus) when I zoom out to create the mask? I have done this a couple of times and I am loosing the detail level of the mask when I create it and save it. When I go back to it after, the detail I selected at the low level was lost. Practical experience and suggestions are greatly welcome!