houdini lut import/export should support "log" shaper

[dbr]

You mean the Sampling Log option?

http://www.sidefx.com/docs/hdk10.0/hdk_io_lut.html

Log color sampling is done at position (p) for LUT index (idx):

 p = e^(idx * (ln(in_end) - ln(in_start)) / (length-1) + log(in_start))

where ln() is the natural log function (log base e) and e is 2.718282. The actual base of the log doesn't matter, as long as it is the same throughout the computation.

[jeremyselan]

Oops, yes we do mean the log option