I am trying to make a PBR texture for P3D v4.5 (specifically a 'metallic' one) and wanted to paint into each of the individual red, green and blue channels for the 'metallic' texture option but it will not let me paint in the individual channels. I have made layers for each channel and shaded them appropriately and my idea was to copy and paste into each respective channel as required much like I would do for the alpha channel. I normally make up the alpha as a diffuse layer and then copy and past it into the alpha channel and then hide the diffuse layer. No matter what I try I cannot paint or copy/paste anything into any of the individual channels.
I have tried Googling for the answer and some suggestions say to try 'splitting' the channels in the channel menu options to allow painting but that command is permanently greyed out for me and not accessible.
Any suggestions? I am using Photoshop CS4 and I have tried both an 8-bit image and a 16-bit image to no avail.
I have tried Googling for the answer and some suggestions say to try 'splitting' the channels in the channel menu options to allow painting but that command is permanently greyed out for me and not accessible.
Any suggestions? I am using Photoshop CS4 and I have tried both an 8-bit image and a 16-bit image to no avail.