I think each r,g,b, vector is 8 bit total of 24 bit. With alpha another 8 bit = 32 bit total. I heard it's best to add any mask/grayscale map to your alpha which only adds one more 8 bit instead of making another 24 bit texture. Also not sure if this is correct but if you set the compression in photoshop to 8 bit grayscale…
Thanks for the examples!! Right, 24 bits per pixel (bpp) is the same as 8 bits per channel (bpc). It's confusing since some apps don't specify when it's per-channel vs. per-pixel. * 8 bits can mean either 8 bits per channel (3 channels = 16.7 million colors, JPG for example), or 8 bits per pixel (1 channel = only 256…