As it says exactly in the text that you sent, the start and end values are expressed as a position relative to the front and back global clipping planes (also called near and far clipping planes), where front is 0.0 and back is 1.0. Maybe you didn't know what the clipping planes are. The near and far clipping planes are the vertical bars shown in the Side View. They clip (slice away) parts of the view. See the Side View help: <https://rbvi.ucsf.edu/chimerax/docs/user/tools/sideview.html> 0.2 is 20% of the distance between the near clipping plane and far clipping plane. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Resource for Biocomputing, Visualization, and Informatics Department of Pharmaceutical Chemistry University of California, San Francisco
On Nov 7, 2025, at 1:08 AM, Vincent CHAPTAL <vincent.chaptal@cnrs.fr> wrote:
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
Le 07/11/2025 à 02:08, Elaine Meng via ChimeraX-users a écrit :
lighting depthCue true depthCueStart 0.2 depthCueEnd 0.8
-- Vincent Chaptal, PhD CNRS research director Team leader Drug Resistance and Membrane Proteins Lab
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