Thank you Elaine for the quick response! I did use the volume resample, but I misunderstood the onGrid pointer… I made it! The volume morph dissolves one part of the complex and appears the other, but I want to have a "movement movie", like using morph for atomic models, one part of the complex flies out and fit into the other part, is there any functions I missed? Thanks! Hong On Aug 18, 2022, at 8:14 PM, Elaine Meng <meng@cgl.ucsf.edu<mailto:meng@cgl.ucsf.edu>> wrote: Hi Hong, As mentioned in the volume morph" help, <https://rbvi.ucsf.edu/chimerax/docs/user/commands/volume.html#morph> "the input maps should have the same grids: dimensions, spacing, and numbers of points. Note volume resample can be used to make a copy of one map that has the same grid as another." Here is the "volume resample" help, with explanation that you can lose some resolution from resampling: <https://rbvi.ucsf.edu/chimerax/docs/user/commands/volume.html#resample> There is also a "volume add" if you are just trying to put different parts together, rather than morphing: <https://rbvi.ucsf.edu/chimerax/docs/user/commands/volume.html#add> I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco On Aug 18, 2022, at 5:36 PM, HONG ZHAN via ChimeraX-users <chimerax-users@cgl.ucsf.edu<mailto:chimerax-users@cgl.ucsf.edu>> wrote: Dear user group, I am trying to do volume morph to transform different parts of a complex into another part of the same complex. Because I did drag and fit each segmented parts, the map positions are no longer the same and I have this error: Map positions are not the same. Is there a way to do the map morph to transform different map parts in the complex? Many thanks! Hong