I’m trying to create an LUT in Photoshop that includes a vignette that makes the centre of the image brighter. I would usually achieve this effect by creating a new fill layer (new gradient fill), changing the style to radial, selecting reverse and change the blending mode to soft light at 45%. However, you can’t use a fill layer for a LUT - only an adjustment layer.
Is there anyway this effect can be achieved through an adjustment layer?