Merging two iterations inside a mask

In this exercise we are going to take those two contrast iterations, the one…that best accommodates the larger image and the one that's better suited to this…area to the left of the flame.…And we are going to merge them together and create a new channel using the…Calculations command.…So we are going to start things of by selecting the region that's good, inside…of this final Alpha Channel.…If you're working along me go ahead and select that final Alpha Channel and then…grab the Lasso tool.…And press and hold the Alt key or the Option key on the Mac then go ahead and…drop polygonal selection outline around the areas that's good, where this…channel is concerned.…

And then I will go ahead and release Alter Option in order to complete that selection.…Now I have selected a little bit too much.…If I zoom in on this knuckle here, you can see that it goes into a kind of…decline where this channel is concerned as we move from the top side of the…finger to the left-hand side.…So I am going to remove some of this selection by pressing the Alt key or the…