Hey all,
Just wondering how to get lightbox to pickup .jpg as alphas instead of loading them as textures or is that just impossible ?
Their all loaded under alphas,but still picks them up as textures instead.
If there isnt, is there way to transfer a texture to my alpha maps within zbrush ?
I am unsure of what the issue may be with Lightbox, as I have not played around with it much, but you can import a .jpg as an alpha directly through the alpha menu without issue.
RGB images will be loaded in the Texture palette.
Gray scale images will be loaded in the Alpha palette.
To have a RGB texure loaded in the GrayScale alpha palette, convert the image to gray scale.
Thankyou 
I’m sorry to bring this topic back, but I have to say I’ve downloaded some alphas from the ZBrush Download Center and experienced this problem. Turns out all of the files I’ve downloaded are in RGB, so they’ll load as textures through Lightbox.
You can batch covert files through photostop np.