Hatuey and Jonathan, It sounds like you can just open the cube file one time and Ctrl- click on the histogram so that there are two contour levels. You can color each isosurface differently even though you just have one copy of the data open. This recent message explains how to undisplay the box that appears when you have negative contour levels: http://www.cgl.ucsf.edu/pipermail/chimera-users/2008-June/002688.html I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. meng@cgl.ucsf.edu UCSF Computer Graphics Lab and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco http://www.cgl.ucsf.edu/home/meng/index.html On Jun 9, 2008, at 2:35 PM, Hatuey Hack wrote:
Hi Tom and Jonathan.
Thanks by your answers.
Tom, my cube file begins as you said (see below). As it has 30MB (I compacted with ZIP and RAR but get a 7MB file!) I could not send to you.
Opt-Freq mo=67 Alpha MO coefficients -34 -19.025542 -8.992895 -7.648475 234 0.166667 0.000000 0.000000 ......
Jonathan,
I load the map twice. In the first control window, I stay at the left (negative value) of the histogram and in the second, I stay at the right (positive). Now, I can see both part of the orbital but I also see a box (from the negative value) that make the surface difficult to see.
Also, I did not see any atoms
Regards,
Hatuey