How to develop a LUT for my specific needs?

Rigging
1

Hi there guys.

I’ve been looking around the internet for too long but without any luck of finding the right LookUp Tables in a LUT format (compatible mainly with 3ds Max, Maya and FrameCycler, well, Photoshop LUTs would be also very nice!).

I’ve seen many papers describing the functions etc… however, I don’t know what is the specification for the LUT file format compatible with Autodesk products as well as with Iridas’ FrameCycler?

If anyone knows where such LUTs could be downloaded or had links to such files/systems specifications I could write my own script to generate the LUT based off of the specifications.

Anyways, I’d be very happy for any tips&tricks and/or links.

cheers,

  • loocas
2

You can apparently load a .lut file in 3dsmax preferences (but I’ve never tried it).

You can create a “gammaCorrect” node in Maya, but there might be other settings when using MentalRay as well?

Photoshop is mostly for print so as far as I know it does the color calibration through ICC profiles only, however it seems to handle Cineon and DPX and maybe some very good cameras can embed 10bit log with lookup table in their RAW format?

Discreet had a .3dl format and Iridas is .itx …
Perhaps this tools here could be what you’re looking for? :
http://www.digitalpraxis.net/cubebuilder.htm

Also check out ILM’s OpenEXR and this interesting article here : (section “SDevs, LUTs and Lattices”) The Power of the Incredible Hulk—the ILM Linux Death Star | Linux Journal

3

Yeah, I know how to work with the LUTs :slight_smile: I just need to generate my own, especially lin-to-sRGB, sRGB-to-lin, and many other lin-to… variants.

I tried the CubeBuilder, but it didn’t actually work that well. I generated a LUT for FrameCycler, but it screwed up the colors tremendously. The Autodesk pre3d LUT didn’t even load up in 3ds Max, so I gave up.

Thanks for the article, I’ll read through it.

[QUOTE=sebddd;1950]You can apparently load a .lut file in 3dsmax preferences (but I’ve never tried it).

You can create a “gammaCorrect” node in Maya, but there might be other settings when using MentalRay as well?

Photoshop is mostly for print so as far as I know it does the color calibration through ICC profiles only, however it seems to handle Cineon and DPX and maybe some very good cameras can embed 10bit log with lookup table in their RAW format?

Discreet had a .3dl format and Iridas is .itx …
Perhaps this tools here could be what you’re looking for? :
http://www.digitalpraxis.net/cubebuilder.htm

Also check out ILM’s OpenEXR and this interesting article here : (section “SDevs, LUTs and Lattices”) http://www.linuxjournal.com/article/6783[/QUOTE]

4

Hello!

I’m not sure, if this is what you need (also, it’s for xsi)
But here you’ll find a tool and a good explanation on how to convert linear rgb to srgb and back:
http://www.xsi-blog.com/archives/133

I hope it helps.

5

Thanks a lot, man, very nice article.

I’ll go through it and as soon as I hit the specification for a LUT or Look tables I’ll probably end up writing a short script to define my own luts.

cheers!