thanks, do you know when tonight's builds will go through, I will test it at that point to see if the functionality made it in -Jeff Tom Goddard wrote:

Hi Jeff,

The trouble obtaining opaque volume planes is not related to volume plane display being built into the volume dialog. It is related to a change I made in how transparency is handled in solid mode back in Aug 2007.

Today I changed transparency in "solid" style volume rendering so it is easier to obtain completely opaque data planes. In tonight's builds (if they succeed, may not since we are switching to Python 2.5 today) you can obtain completely opaque volume planes by using the "Brightness and Transparency" panel of the volume dialog to set transparency to 0. This transparency value represents the fraction (0-1) of the depth of the volume required to produce opacity to the degree indicated by the height of the yellow curve on the histogram. In other words it modulates the overall transparency. But until today it was arbitrarily deciding not to modulate the transparency if this depth was less than one grid spacing. This meaning of the transparency factor was introduced in August 2007, and prior to that the transparency factor just scaled the opacity given by the yellow curve.

Tom

Jeff wrote:

...

hi Tom,

in the older (plug-in) volume planes tool, I was able to generate images that were opaque planes. I don't seem to be able to do this anymore, even with transparency = 0. is there a way for me to do this in the current Chimera?

-- ------------------------------------------------------------- Jeff Triffo Auer Group, Donner Lab, Lawrence Berkeley National Laboratory Raphael Group, Bioengineering Department, Rice University Medical Scientist Training Program (MSTP), Baylor College of Medicine phone (Berkeley): 510-486-7940 fax (Berkeley): 510-486-6488