how do I transfer .tiff to .jpg?

[cmrhm]

It looks I still don't know much about .tiff file. there is no curve tool for this format. Also, I can't find way to transfer this to jpg.

 

Anyone help? Thx.

[Dave Buchhofer]

Most likely you just want to Image -> Mode -> 16bits per channel, then you'll be fine. (Or 8 bits per channel)

 

photoshop is pretty limited in what it can do with 32bit images.

[cmrhm]

Most likely you just want to Image -> Mode -> 16bits per channel, then you'll be fine. (Or 8 bits per channel)

 

photoshop is pretty limited in what it can do with 32bit images.

 

Thx Dave. what difference between 32bit with 16bit? Does 32bit have one more channel?

 

I am doing a building 3dmax rendering now. And will generate either .tiff or .tga format drawings. This will have a seperate layer for the shadow. So I can control the intensity of shadow seperately. Which format you think best suit to my needs, tiff or tga?

 

Thx again for the help.

[aaronrumple]

So I can control the intensity of shadow seperately. Which format you think best suit to my needs, tiff or tga?

 

*.exr

You don't even need a shadow pass. You can adjust the shadow levels in PS. Or use something like Picturenaut if you prefer.

 

Color depth primer:

http://en.wikipedia.org/wiki/Color_depth

 

EXR holds more luminance data. So it can adjust to a wider range of light/dark and do what you want with your shadows.

http://en.wikipedia.org/wiki/OpenEXR

http://en.wikipedia.org/wiki/High_dynamic_range_imaging

Edited April 16, 2010 by aaronrumple

[cmrhm]

*.exr

You don't even need a shadow pass. You can adjust the shadow levels in PS. Or use something like Picturenaut if you prefer.

 

Color depth primer:

http://en.wikipedia.org/wiki/Color_depth

 

EXR holds more luminance data. So it can adjust to a wider range of light/dark and do what you want with your shadows.

http://en.wikipedia.org/wiki/OpenEXR

http://en.wikipedia.org/wiki/High_dynamic_range_imaging

 

Thx Aaaron. Really? While I am in PS, I want to just adjust the shadow with touching anything with the others. Can I do it in exr format? I am looing at exr right now but can't figure out a solution.

 

Pls teach me. This would save me alot of time. Thx again for the link. Those are very good for my future reference.

Edited April 16, 2010 by cmrhm

[aaronrumple]

Thx Aaaron. Really? While I am in PS, I want to just adjust the shadow with touching anything with the others. Can I do it in exr format? I am looing at exr right now but can't figure out a solution.

 

Pls teach me. This would save me alot of time. Thx again for the link. Those are very good for my future reference.

 

Image > Adjust > Shadow-Highlight

Works on any image.

 

Look up tone mapping for HDR images. PS has some capabilities.

Picturenaut might be simpler.

[cmrhm]

Image > Adjust > Shadow-Highlight

Works on any image.

 

Look up tone mapping for HDR images. PS has some capabilities.

Picturenaut might be simpler.

 

I was using adjust>exposure. so this Shadow-highlight definitely would be better than exposure then.

[Dave Buchhofer]

Thx Dave. what difference between 32bit with 16bit? Does 32bit have one more channel?

 

32bit has more "room" to color correct, if you need to do huge exposure shifts, do it in 32bit, then collapse down to 16bit to let you use the better tools to adjust from there.

 

you're probably really just looking for render elements.

 

I tend to just go with PNG myself, and save elements out to individual files via the Vray frame buffer, theres less screwing with gamma and output gamma and ProEXR and other crap you need to keep in mind with EXR.

 

just use the File -> Scripts -> Load Images into Stack in photoshop to get the same effect.

[cmrhm]

32bit has more "room" to color correct, if you need to do huge exposure shifts, do it in 32bit, then collapse down to 16bit to let you use the better tools to adjust from there.

 

you're probably really just looking for render elements.

 

I tend to just go with PNG myself, and save elements out to individual files via the Vray frame buffer, theres less screwing with gamma and output gamma and ProEXR and other crap you need to keep in mind with EXR.

 

just use the File -> Scripts -> Load Images into Stack in photoshop to get the same effect.

 

Dave:

 

VERY valuable suggestions. Thanks.

[Jim Mann]

To be honest with you, you could probably get away with 8 bit for 99% of your work without ever noticing. I would only suggest 16bit or higher if you have a lot of fine gradients in your work. The banding that you see in light falloff or in the sky is caused by the lack of dynamic range in 8 bit but you can usually counteract this with noise/grain. DSLR cameras produce 8 bit images or 12 bit RAW files. The RAW files are wonderful but theres nothing wrong with the standard 8bit files as the natural world is quite noisey. Its only in the clean and perfect world of 3D where this banding becomes a problem.

[Jim Mann]

Just read your post again. Do your shadow pass seperately if you want more direct control over it but 8 bit should be fine. If in doubt go with 16bit as you always have the option to change down to 8 bit.

 

Would now be a good time to mention log v linear workflow?