I know the radial filter has an invert mask option but I need to choose my own specific shape and area. I do real estate photography and I want to brighten up the rest of the room and leave the windows in the room alone, so they don't get all blown out. I know I can do this in PS but was hoping there might be an option somehow to achieve this in LR.
It needs some 'reverse psychology'!
Do a global 'Lighten' , then use the Brush to 'Darken' the windows- Auto-mask 'on' will help selecting the overlay area specifically on the window areas.
Thanks for your response, that's pretty much what I do now. When I bring in the image, the windows are perfect and don't want to mess with them and just want to brighten the rest of the room. Was hoping there wa a solution to choose a mask area in LR that would be unaffected by global edits.
There is no mask available for global edits; however, you could use a large low-feather brush to lighten the entire image, then switch to the eraser brush with Auto Mask on to erase the effect from the windows.