how could you got a succes to do this? Please read this notes:
8 bit: Colors are converted 8 bit RGBA channels.
Float tonemapped: Colors are direct output of Octane Render and with tonemapping by camera imagers. Notify that colors will be clamped by max. 1.0. This works well with 16/32 bit images(tiff,exr,etc..)
Float linear: Colors are direct raw output of Octane Render without tonemapping. Gamma=1.0. This works well with 16/32 bit images(tiff,exr,etc..). Linear color space for saved image, this is recommended setting to avoid user confusions. In Live Viewer, to get same colors, you should set gamma=2.2 and linear camera response of camera imagers. Also this mode supports unclamped color outputs.
Octane For Cinema 4D developer / 3d generalist
3930k / 16gb / 780ti + 1070/1080 / psu 1600w / numerous hw