VisIt 3.4.1: mesh opacity bug and missing triad lines

[tharman-git]

Greetings,

With visit 3.4.1 there are two new bugs:

1. The lines on the Triad are missing, see attached pngs.

2. When I decrease the opacity from 100% in mesh plot attributes the view becomes garbled.

Below are two images that show the correct and the garbled mesh view.

These feature have worked with previous versions of VisIt.

Relevant Details:

We're loading Uintah data and using the server-client mode between a Debian 11 desktop and a cluster.

Client: VisIt installed from visit3_4_1.linux-x86_64-debian11.tar.gz

Server: VisIt compiled using

build_visit3_4_1 --parallel --uintah --no-icet --mesagl --llvm --no-sphinx --skip-opengl-context-check --system-cmake --qt6 --vtk9 --visit --makeflags -j20

 modules loaded:
 1) chpc/1.0 (S)   2) gcc/11.2.0   3) zlib/1.3.1   4) openmpi/4.1.6   5) cmake/3.26.0

[biagas]

Not sure if it's related to your issue, but a transparency bug was recently fixed. I wonder if you could provide input so we can see if that fix resolves your issue, too. Having data might also help isolate the Triad problem, not sure that's been reported already.

[JustinPrivitera]

related to #19123

[tharman-git]

Attached is a Uintah Data Archive (uda) and a VisIt session file. I used 10 cores in VisIt.

To open the uda select the file advect.uda.000->index.xml

meshOpacityBug.tar.gz

[cyrush]

@tharman-git we have resolved several issues related to VTK and opacity, we are going to take a look at the triad issue with your data.

[JustinPrivitera]

Hi @tharman-git. Sorry for the delay on this. I can reproduce your issue locally; thanks for the data and session file. I can confirm that the opacity issue has been fixed in our upcoming VisIt release. The triad line issue is annoying and is still an open issue. You can work around it by manually changing the Triad line width to something bigger than 1 in the Annotation settings:

To get around the opacity issue, you can turn off scalable rendering mode and run in serial, or you can use the beta install of VisIt that we have placed on the open side at /usr/gapps/visit/beta/bin/visit. A closed side install is coming shortly.

[JustinPrivitera]

I am going to close this issue because the opacity bug has been fixed and there is already a ticket open for the triad lines disappearing.

[tharman-git]

Thank you!

[JustinPrivitera]

Forgot to mention before that the open and closed side versions of the 3.4.2 beta with the opacity fix are available at /usr/gapps/visit/beta/bin/visit