I have a TIFF file uploaded to Photoshop. I'm trying to adjust the brightness/contrast via Image>Adjustments, and via a new adjustment layer, but that option brightness/contrast is grayed out. Levels and Exposure work. Any ideas why?
What are the image’s Color Mode and bit depth?
Could you please post screenshots with the pertinent Panels (Toolbar, Layers, Options Bar, …) visible?
I'll bet you have a 32-bit document here which is why they are grayed out. Go into menu Image>Mode; what does it show for bit depth? If 32-bit, that's why. You'll have to convert to 16-bit (or 8) to use those adjustments.
Yep, 32-bit. What's the best way to convert to 16 if I can't change the original rendering to 16?
Just use that Mode menu option and select 16-bit.
It gave me a funky image. Will play with it.
Image > Mode > 16 Bits/Channel
Could you please post a meaningful screenshot?
Edit: Ah, I assume you mean RGB 32bit.