Can't save PSD as JPEG
I have a PSD file with one layer. When I try to save as JPEG it doesn't show JPEG and other formats as an option. It only displays a limited set of formats (5) including Photoshop.
When I manually create another PSD file I am able to save it in any format I like. I think it's something with palette or layers.
What can be wrong with the PSD file that I can't save in normal formats and what I can do to save it to these formats in Photoshop?
I have the following MODE: RGB, 32 Bit/Channel.
When I switch to 8 Bit/Channel it works now - I have all standard formats as option - JPEG, PNG, etc. But the problem now is that my image doesn't look good with 8 Bit color. Is it possible to do something to save it without losing the original picture?
I have 32 bit JPEG photos on my computer + most icons I work with are 32 bit PNG images. Why doesn't Photoshop allow 32 bit JPEG ? What am I doing wrong?
Is 8 bit/channel actually 32 bit color?
Any time a format isn't available in the Save As dialog, it means that format is invalid for the document in the state it's in. There's no such thing (as Lese and cwedge point out), as a 32-bit (or 16-bit) jpeg, nor a duotone, Lab or 1-bit bitmap jpeg.
Photoshop versions prior to CS5 would simply not show jpeg as an available option for 16-bit images, which drove enough people slightly crazy that the Photoshop team incorporated an automatic conversion into CS5.
A valid jpeg is an 8-bit image in RGB or CMYK.
To answer your three updates, you are not going to get the same quality from 8 bits/channel as from 32 bits/channel, but jpeg is 8 bits/channel so you don't have a choice if you need jpeg output. By working carefully in Photoshop, you can achieve the best compromise for a particular purpose.
Bit depth is specified differently depending on context. For an image, "8 bit" means 8 bits per channel. A CMYK jpeg has 8 bits x 4 channels -- 32 bits per pixel -- but is still referred to as "8 bit". A "16 bit tiff" is an tiff with 16 bits per channel.
Displays are specified in bits per pixel, so a "24 bit display" allows 8 bits per RGB channel. The newest monitors are 30 bit -- 10 bits per RGB channel -- but require special support from both the OS and the GPU.