Originally Posted by Pres2play
You are correct, the graphics card should be set to full range. TV Levels (limited range) can then be set using the LightSpace VideoScale function. Here it is from the ee manual...
eeColor LUT Box LUT Format
Depending on the display and source in use (data range, or TV level) the eeColor LUT Box may requires LUTs in a particular data range.
For TV Levels, after the calibration LUT has been generated via LightSpace CMS in the normal way, use the 'Edit/LUT Manipulation/VideoScale' function to format the LUT data correctly.
For data range display workflows the re-scale will not be needed.
Hi, the VideoScale is only a filter you apply to your correction LUT (cLUT), not related with your output settings.
For eeColor users, once they have generate the correction 3D LUT Table, the last step before exporting the cLUT to eeColor 65.TXT format, it's to apply the VideoScale filter.
We do this for eeColor because eeColor's internal 10-bit table is 0-255, the videoscale is mapping the correction to 16-235 levels, since we will use it for HT enviroment / blu-ray content etc.
The VideoScale is not required for Lumagen users because it's internal 10-bit table can control video levels (16-235) only.
LightSpace has 2 options about VideoScale Filter:
VideoScale with passblack and VideoScale with clip black.
The VideoScale with Pass Black is mapping the levels from 0-255 to 16-235 and later it applies a UNITY to 0-16 levels. so all below black information is visible.
The VideoScale with Clipping Black is mapping the levels from 0-255 to 16-235 and later and all the 0-16 levels are becoming 16. so all below black information is becoming 16, no below black information is visible.
One scenario where VideoScale with Clipping Black is helpful is when we have a display which it's difficult to set with success it's near black with a brightness with flashing bars pattern using the display's internal brightness control setting.
For example lets say we have a display...when we display a brightness pattern with flashing bars, we don't see 17,18 flashing bars with internal brightness setting at zero....
but when we use +1 brightness, we see 17,18 flashing bars correctly but we see the 15 and 16 flashing also.
In that case when we will apply VideoScale with Clipping Black, the 16 and below bars (15,14 etc) will become 16 also, so we will be able to see correctly see the near black details of 17,18 levels to that specific display.