Re: [PyMOL] Two issues with the draw command with current pymol version 3.1.5.1

[Jarrett J. <jar...@sc...>]

Hi Norbert

Sorry, a little late to reply here, but we released 3.1.6.1 early last
week. The second issue where the image is rendered partially from the draw
command should have been addressed.

Unfortunately, the label issue still remains. It seems this has been an
issue In PyMOL for a while. For the draw command by default, PyMOL will
render the image at a higher resolution and scale it back down to remove
jagged edges (Supersampling Antialiasing). However since we draw text at
constant font size regardless of the viewport size, the text shrinks when
we perform the downscaling for the whole image. One way to avoid this is to
set the *antialias *parameter (which is separate from the settings) to zero
(see here <https://pymolwiki.org/index.php/Draw>) which will elide SSAA
pass altogether (you should still be able to use the antialias shader
settings in conjunction with this if you want smoother edges).

Hope that helps,
Jarrett J.

On Thu, May 29, 2025 at 9:00 PM Jarrett Johnson <
jar...@sc...> wrote:

> Hi Norbert,
>
> Thanks very much for the repro steps. I could reproduce this and I believe
> I know where the issue lies (since I caused them 😅). I'll aim to have
> these ironed out by the next patch.
>
> Best,
> Jarrett J
>
> On Fri, May 23, 2025 at 5:38 PM Norbert Straeter <
> st...@bb...> wrote:
>
>> Dear all,
>>
>> I would like to report two issues with the current pymol version
>> 3.1.5.1, which were present as well already in 3.1.4. The two problems
>> were not present in my previous installation of version 3.0.2. The two
>> problems are observed on a windows 11 notebook and on a linux computer.
>> The issues appear with different images, the following is a simple test
>> case:
>>
>> reinitialize
>> viewport 800,600
>> pseudoatom my_atom, pos=[1.0, 2.0, 3.0]
>> show spheres, my_atom
>> set label_position, [0.0, 0.0, 2.0]
>> label my_atom, "my_atom"
>> set label_size, 30
>> set label_color, black
>> zoom my_atom
>>
>> (1) draw command results in smaller label size
>>
>> If you use the draw command after pasting the commands above, the label
>> is plotted much smaller. When using the ray command, the label size is
>> fine. Using pymol 3.0.2 draw and ray commands result in approximately
>> the same label size as in the interactive working window.
>>
>> (2) draw command in conjunction with "set antialias_shader, 2" renders
>> only part of the image
>>
>> If you "set antialias_shader, 2" and use the draw command, only part of
>> the image is rendered. This may seem like a special option, but it is
>> part of the Menu option "Display, Quality, Maximum Quality", which I
>> frequently use. The ray command is not affected. "set antialias_shader,
>> 0" (the default) or "set antialias_shader, 1" cause no problem.
>>
>> Best regards,
>>
>> Norbert
>>
>>
>>
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>
>
>
> --
>
> *Jarrett Johnson* | Staff Developer, PyMOL
>
>

-- 

*Jarrett Johnson* | Staff Developer, PyMOL