[Chimera-users] Saving Images

Elaine Meng meng at cgl.ucsf.edu
Wed Aug 8 11:29:47 PDT 2012

Hi Eric,
When you save an image with supersampling, initially the image is drawn larger and then sampled down to the final requested size.  The problem is that graphics drivers have an upper bound on linewidth that can be drawn, so the line can only be so fat in the initial image, and then when it is sampled down, it is thinner.  The image dialog will report (near the bottom) the maximum attainable linewidth in the final image given the requested image dimensions and the supersampling level.

Decreasing the supersampling level and/or image dimensions will increase the attainable line fatness.  Generally supersampling is nice because it smooths edges (pixel stairsteps less visible), so I would first see if 2x2 supersampling ameliorates the problem before turning it off entirely.

For further discussion/explanation, see this previous post:

Elaine C. Meng, Ph.D.                       
UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab
Department of Pharmaceutical Chemistry
University of California, San Francisco

On Aug 7, 2012, at 2:09 PM, Hobbs, Merlin Eric wrote:

> We are having trouble saving images to look a certain way.  More specifically we are trying to make an image with the distance from a residue to a metal ion shown.  The problem arises when we save the image the 'thickness' of the distance line doesn't change on the actual saved image. So no matter what the thickness is on chimera the image will always show the distance line as being less thick. 
> Thanks
> Eric

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