[Chimera-users] Reset surface programatically from python

Hi everyone, I have this line of code where I want to load a density and export a negative surface of it: import chimera as ch mod = ch.openModels.open(‘./density.em')[0] mod.surface_levels = [-1,0] mod.display = True ch.exports.doExportCommand('WebGL', 'tmp.html’) However, the surface of the density is rendered for positive values. How can I refresh the display after I specify the surface_levels? Thanks, Thomas