There is now a script available for batch processing DP2M files through Kalpanika that includes automatic color cast correction. This is currently for Mac only and also requires the most recent versions of Kalpanika and Exiftool. The script will batch convert a folder full of x3f files to DNG format that can be processed in either Lightroom or Adobe ACR in Photoshop. Works quickly and gives clean files without color casts. Script was written and posted for download by Georg in the DPR Sigma forum. Dp2M Kalpanika Script. Here are a few output samples that I posted in the thread discussing the script.