Bit Depth In Nuke

[marien]

I think I have heard that Nuke internally handles everything in 32 bit. I have the problem, that when I multiply footage in floating space, the white area is too bright (over 1) and brightens up the image. In shake I usually put a bytes node in there (set the bit depth to 16 or 8 bit) and everything works fine. Is there a way to handle this in Nuke, because I can't find something similar in there , where I can tell Nuke which bit depth I want to use.

hope someone has an idea....

thanks

Frank

[lebedev2]

I don't have NUKE in front of me but I think all you need to do is add and a math > clamp node at he end and bring all your values back into 0 -1, I hope anyways cuz this is what I do.

s

[user_deleted]

well, if you multiply stuff in 8 or 16 bit depth than you effectively clamp everything above one straight away as there are no values beyond that in those bit depths.
since nuke is optimized for floating point and doesn't bother about lower bit depths all you have to do is either use a clamp node or simply render to a 8 or 16 bit file format.
however, be aware that this means decreasing the quality of your comp as you're losing lots of values.
especially when you keep grading stuff downstream you can run into some ugly results if you clamp your comp.

frank

[marien]

ok, that's the trick.

thank you guys