## Tone Mapping

Cache. Luminance HDR needs a directory to save temporary files to. By default home directory is used, but you can specify some other directory.

You can also specify two options for Batch Tone Mapping feature:

File format for LDR images. This is the file format to which tonemapped LDR images will be saved to. JPEG, PNG, PPM, PBM and BMP are your options.

Number of threads. How many threads you want to use. Each thread gets allocated to a different CPU or a core of a multicore CPU.