From: Vincent CHAPTAL <vincent.chaptal@cnrs.fr>
Sent: Friday, November 7, 2025 11:08 AM
To: ChimeraX Users Help <chimerax-users@cgl.ucsf.edu>; Elaine Meng <meng@cgl.ucsf.edu>; Citterico, Matteo <matteo.citterico@helsinki.fi>
Subject: Re: [chimerax-users] Re: front-back shadow

Hi Elaine,

following what you wrote, could be more precise on the meanings of start and end:
Manual:
depthCueStart  start
depthCueEnd  end
Set the position of the depth-cueing ramp. Depth-cueing shading increases linearly from start to end, each expressed as a position relative to the front (0.0) and back (1.0) global clipping planes (0.5 to 1.0 in simple lighting).

- What is the start really? Is it where the viewer/user seats on his chair? Because if I use your command I get a certain depthcue, but if I zoom on the structure and use the same command it doesn't change the depthcue.
- Is 0.2 the relative start of the PDB file?
- Where does it end?
- is it related to the Side view bars?

Thanks for these clarifications.
Vincent

lighting depthCue true depthCueStart 0.2 depthCueEnd 0.8