Hi Yarrow, I've played with POV-Ray for years now on and off. The reasons to use POV-Ray are mostly for transparency and cool shadows. However, I have found that for most renders, the engine in PyMOL or those in VMD produce more intelligible and intuitive pictures than POV-Ray, even though the shadowing and transparency calculations in POV-Ray are more sophisticated and "accurate".
By all means, play with POV-Ray, but it is a deep rabbit hole that may take more time than you may eventually find it will be worth. FWIW, Darrell Darrell Hurt, Ph.D. Section Head, Computational Biology Bioinformatics and Computational Biosciences Branch (BCBB) OCICB/OSMO/OD/NIAID/NIH 31 Center Drive, Room 3B62B, MSC 2135 Bethesda, MD 20892-2135 Office 301-402-0095 Mobile 301-758-3559 http://bioinformatics.niaid.nih.gov (Within NIH) http://exon.niaid.nih.gov (Public) Disclaimer: The information in this e-mail and any of its attachments is confidential and may contain sensitive information. It should not be used by anyone who is not the original intended recipient. If you have received this e-mail in error please inform the sender and delete it from your mailbox or any other storage devices. National Institute of Allergy and Infectious Diseases shall not accept liability for any statements made that are sender's own and not expressly made on behalf of the NIAID by one of its representatives. ----- Original Message ----- From: Yarrow Madrona [mailto:amadr...@uci.edu] Sent: Wednesday, May 29, 2013 01:41 PM To: Patrice Peterson <patrice.peter...@student.uni-halle.de> Cc: pymol-users@lists.sourceforge.net <pymol-users@lists.sourceforge.net> Subject: Re: [PyMOL] internal cavity lighting Thanks Patrice, I have used VMD mostly to look at trajectories. I should delve into in a bit more. I really like having a one stop-shop for illustration which is why I like pymol. However, I have heard a lot about POV-ray and want to explore it. I have also heard that it is a "black-hole" and very difficult. Still maybe worth it. -Yarrow > On 13-05-28 14:11, Yarrow Madrona wrote: >> Hi, >> >> I saw a post on this sight a while back about how to move the >> lighting. However, I have not seen any information on how to change >> the lighting of an internal cavity. I want the internal cavity to >> appear darker as it would be more realistic. However, it is almost >> like there is a light source coming from inside the object that >> brightens it up. >> >> Does anyone know how to change the internal lighting of a cavity when >> shown in surface representation? >> >> Thanks. > > Hey, > > What you probably want is some kind of ambient occlusion. The tachyon > rendering library (which is used with VMD) can do that. However, you can > get a similar effect in PyMOL using the POV-Ray renderer with > appropriate radiosity settings. I'm using a modified make_pov.py script > to do something similar [1], but the POV-Ray settings are not yet > finalized (I'm very new to POV-Ray myself). I'd also suggest using > POV-Ray 3.7 to allow the use of multiple cores, as radiosity can > increase rendering time quite significantly. > > The file I posted does not yet have the correct field of view. I'll > update the Gist once I've found the correct value. > > Cheers, > Patrice > > [1] https://gist.github.com/runiq/5669624 > >>-- >>Yarrow Madrona >> >>Graduate Student >>Molecular Biology and Biochemistry Dept. >>University of California, Irvine >>Natural Sciences I, Rm 2403 >>Irvine, CA 92697 > ------------------------------------------------------------------------------ > Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET > Get 100% visibility into your production application - at no cost. > Code-level diagnostics for performance bottlenecks with <2% overhead > Download for free and get started troubleshooting in minutes. > http://p.sf.net/sfu/appdyn_d2d_ap1_______________________________________________ > PyMOL-users mailing list (PyMOL-users@lists.sourceforge.net) > Info Page: https://lists.sourceforge.net/lists/listinfo/pymol-users > Archives: http://www.mail-archive.com/pymol-users@lists.sourceforge.net -- Yarrow Madrona Graduate Student Molecular Biology and Biochemistry Dept. University of California, Irvine Natural Sciences I, Rm 2403 Irvine, CA 92697 ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ PyMOL-users mailing list (PyMOL-users@lists.sourceforge.net) Info Page: https://lists.sourceforge.net/lists/listinfo/pymol-users Archives: http://www.mail-archive.com/pymol-users@lists.sourceforge.net ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ PyMOL-users mailing list (PyMOL-users@lists.sourceforge.net) Info Page: https://lists.sourceforge.net/lists/listinfo/pymol-users Archives: http://www.mail-archive.com/pymol-users@lists.sourceforge.net
