If you have an tentative atomic model fit into your map you could compute a low resolution simulated map from the atomic model (molmap command) and use the surface of that simulated map to mask the density (mask command). For example

Not sure what you mean volume eraser does not delete anything. Position the sphere with mouse and press the Erase button to erase -- it makes a new copy of the map with part erased that you could save to a file. But I wouldn't recommend that approach if you have an atomic model.

On Dec 5, 2019, at 11:33 AM, Krishan Pandey <krishan.pandey@health.slu.edu> wrote:

Hi
I am kind of new to Chimera and was wondering if there is a video tutorial about creating a mask in Chimera. I intend to use the mask for local resolution or multi body refinement. To experienced users this may be a novice question. I tried to search online but could find any. When I use volume eraser to delete part of EM map, it does not do anything, nothing is deleted.
I am using Chimera 1.13.1 (build 41965).
Any help is appreciated.

Thank you
Krishan Pandey

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