Hi, By tweaking the projection matrix, we can divide a big scene into several sub-images and render them separately. Thus, we can reduce the memory consumption. I think this is scriptable, although I don't have time to implement myself.
> I was wondering if the developers have come across this upper limit too? > I have a 2400 dpi printer, so I want to go with the highest dpi possible > for the best quality. "2400 dpi" for a printer does not have the same meaning as 2400 dpi (or better, ppi, pixel per inch) for a screen. Printers use many dots to represent an image pixel. Did you take that into the account? Probably you don't need 2400 dpi or 1200 dpi. https://en.wikipedia.org/wiki/Dots_per_inch#/media/File:DPI_and_PPI.png Best regards, Takanori Nakane Am 2016年05月10日 um 09:34 schrieb Stephen Kerry: > Thank you for trying this out on a workstation with 128 GB and then 256 > GB of RAM. It is much appreciated as I do not have easy access to that > kind of computational power. The fact that you also get these segfaults > with all of your RAM, suggests that this might be a PyMOL limitation, > rather than a hardware issue. > > I have come to the conclusion that it is impossible to ray trace an > image with an output resolution greater than 45 megapixels (7500 x > 6000). Halving the dpi from 1200 to 600 gives a 11.25 megapixel (3750 x > 3000) resolution. > > I was wondering if the developers have come across this upper limit too? > I have a 2400 dpi printer, so I want to go with the highest dpi possible > for the best quality. > > ------------------------------------------------------------------------ > *From:* David Hall <li...@cowsandmilk.net> > *Sent:* 06 May 2016 19:17:38 > *To:* Stephen Kerry > *Cc:* pymol-users@lists.sourceforge.net > *Subject:* Re: [PyMOL] High Resolution Ray Tracing > Feel free to send me the files off list. > > -David Hall > >> On May 6, 2016, at 1:54 PM, Stephen Kerry <stephen.kerr...@outlook.com >> <mailto:stephen.kerr...@outlook.com>> wrote: >> >> Dear All, >> >> I have a protein complex scene that I need to create a large, high >> resolution (1200 dpi) ray traced image of, but am unable to do so as I >> always run out of memory at the end of the ray tracing process, with >> the following error: >> >> python2.7(972,0x7fff7397f300) malloc: *** >> mach_vm_map(size=18446744068907188224) failed (error code=3) >> *** error: can't allocate region >> *** set a breakpoint in malloc_error_break to debug >> >> This is with PyMOL 1.81 from Fink on OSX 10.10 with >> ani7-4790Kprocessor and 32 GB of DDR3. Python2.7 expands up to 15 GB >> of RAM, with more than twice this reserved for virtual memory, but no >> swap is actually used. >> >> Decreasing hash_max just increases the ray tracing time until the >> error at the end. Sometimes PyMOL will be terminated with this error, >> whilst at other times a transparent PNG is all that is produced. >> >> Is there a way to force PyMOL to use virtual memory to avoid these >> errors/crashes at the expense of processing time? >> >> If not, is there anyone who has PyMOL 1.8x installed on a system with >> 64 GB or more RAM, who would be able to render this ray traced image >> if I send the, the .pse file and .pml script off list? Takes about 10 >> mins to process. >> >> Cheers, >> >> Stephen >> >> ------------------------------------------------------------------------------ >> Find and fix application performance issues faster with Applications >> Manager >> Applications Manager provides deep performance insights into multiple >> tiers of >> your business applications. It resolves application problems quickly and >> reduces your MTTR. Get your free trial! >> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z_______________________________________________ >> PyMOL-users mailing list (PyMOL-users@lists.sourceforge.net >> <mailto: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 > > > > ------------------------------------------------------------------------------ > Mobile security can be enabling, not merely restricting. Employees who > bring their own devices (BYOD) to work are irked by the imposition of MDM > restrictions. Mobile Device Manager Plus allows you to control only the > apps on BYO-devices by containerizing them, leaving personal data untouched! > https://ad.doubleclick.net/ddm/clk/304595813;131938128;j > > > > _______________________________________________ > 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 > ------------------------------------------------------------------------------ Mobile security can be enabling, not merely restricting. Employees who bring their own devices (BYOD) to work are irked by the imposition of MDM restrictions. 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