AS a new user of Chimera, I apologize for asking what , for many of you, is probably a trivial question.... initially when using Chimera ,creating an image (using pseudobond Reader) and then saving an image file, (save image) all worked well, but in the last couple of days, every time I save an image file in whatever mode (png, tif, jpg etc), I get my image with a heavy black grid across it.(and on two different computers). I am using Chimera 1.254. Is there a simple fix- it feels like a conflict. I attach one of the images Thanks for your help (Windows XP, SP3) Barry -- A. B. P. Lever Distinguished Research Professor Emeritus Chemistry, CB124, York University 4700 Keele St., Toronto, Ont., Canada M3J 1P3 Tel:416-736-2100 x22309 Fax: 416-736-5936 http://www.chem.yorku.ca/profs/lever
Please see previous response to duplicate question: <http://www.cgl.ucsf.edu/pipermail/chimera-users/2008-September/003068.html
Hi Barry, This is very likely a problem related to "supersampling", an option for producing higher quality images with Chimera. You should try changing the supersample setting in the File / Save Image... dialog. I suspect 1x1 will not give the grid but the fonts won't look as good in the image. The normal 3x3 setting makes an image 3 times larger in both dimensions then averages it down to your requested size. That smooths out jagged edges. You can get a similar effect by using 1x1 (no supersampling) then make a bigger image and reduce its size in a photo editing program (photoshop, gimp). Tom Barry Lever wrote:
AS a new user of Chimera, I apologize for asking what , for many of you, is probably a trivial question.... initially when using Chimera ,creating an image (using pseudobond Reader) and then saving an image file, (save image) all worked well, but in the last couple of days, every time I save an image file in whatever mode (png, tif, jpg etc), I get my image with a heavy black grid across it.(and on two different computers). I am using Chimera 1.254. Is there a simple fix- it feels like a conflict. I attach one of the images Thanks for your help (Windows XP, SP3)
Barry
Barry reports that supersample 1x1 did not remove the black grid on his Chimera images. Tom Barry Lever wrote:
Tom: Thanks for suggestion- but alas it did not resolve the problem. I have run Chimera on 3 computers, 2 give me this grid problem, but the third works fine so the issue is not critical- I can use the third computer for graphics. It has been suggested that the problem relates to using a generic graphic video card on one of these 'bad' computers but I doubt this is the reason since previously this 'bad' computer did not give me a black grid problem- but the problem may have arisen when I upgraded to the latest version of Chimera.
Thanks for your thoughts
Barry
Thomas Goddard wrote:
Hi Barry,
This is very likely a problem related to "supersampling", an option for producing higher quality images with Chimera. You should try changing the supersample setting in the File / Save Image... dialog. I suspect 1x1 will not give the grid but the fonts won't look as good in the image. The normal 3x3 setting makes an image 3 times larger in both dimensions then averages it down to your requested size. That smooths out jagged edges. You can get a similar effect by using 1x1 (no supersampling) then make a bigger image and reduce its size in a photo editing program (photoshop, gimp).
Tom
Barry Lever wrote:
AS a new user of Chimera, I apologize for asking what , for many of you, is probably a trivial question.... initially when using Chimera ,creating an image (using pseudobond Reader) and then saving an image file, (save image) all worked well, but in the last couple of days, every time I save an image file in whatever mode (png, tif, jpg etc), I get my image with a heavy black grid across it.(and on two different computers). I am using Chimera 1.254. Is there a simple fix- it feels like a conflict. I attach one of the images Thanks for your help (Windows XP, SP3)
Barry
Since this is no longer confined to a bug report. Barry's problem isn't that he has a generic graphics card, but that he has never installed an OpenGL driver for the graphics card. And so he is using the default lousy generic Microsoft one. It may still be a bug in chimera, but the Microsoft OpenGL driver is not worth spending anyone's time debugging. - Greg On Tue, 16 Sep 2008, Tom Goddard wrote:
Barry reports that supersample 1x1 did not remove the black grid on his Chimera images.
Tom
Barry Lever wrote:
Tom: Thanks for suggestion- but alas it did not resolve the problem. I have run Chimera on 3 computers, 2 give me this grid problem, but the third works fine so the issue is not critical- I can use the third computer for graphics. It has been suggested that the problem relates to using a generic graphic video card on one of these 'bad' computers but I doubt this is the reason since previously this 'bad' computer did not give me a black grid problem- but the problem may have arisen when I upgraded to the latest version of Chimera.
Thanks for your thoughts
Barry
Thomas Goddard wrote:
Hi Barry,
This is very likely a problem related to "supersampling", an option for producing higher quality images with Chimera. You should try changing the supersample setting in the File / Save Image... dialog. I suspect 1x1 will not give the grid but the fonts won't look as good in the image. The normal 3x3 setting makes an image 3 times larger in both dimensions then averages it down to your requested size. That smooths out jagged edges. You can get a similar effect by using 1x1 (no supersampling) then make a bigger image and reduce its size in a photo editing program (photoshop, gimp).
Tom
Barry Lever wrote:
AS a new user of Chimera, I apologize for asking what , for many of you, is probably a trivial question.... initially when using Chimera ,creating an image (using pseudobond Reader) and then saving an image file, (save image) all worked well, but in the last couple of days, every time I save an image file in whatever mode (png, tif, jpg etc), I get my image with a heavy black grid across it.(and on two different computers). I am using Chimera 1.254. Is there a simple fix- it feels like a conflict. I attach one of the images Thanks for your help (Windows XP, SP3)
Barry
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participants (5)
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Barry Lever -
Elaine Meng -
Greg Couch -
Thomas Goddard -
Tom Goddard