(2024-02-02, 5:16)N. W. Perry Wrote: Don't know if the FBO initialization failure is a cause or effect of this bug, but maybe this helps?
FBO is an OpenGL thing, it allows for offscreen rendering. LDCad uses this to only update changed regions of the screen.
If the option is disabled it will always render everything unless the fallback 'hack' option of 'reuse frontbuffer' is enabled, but that option shouldn't be used on newer hardware as it will most likely corrupt the rendering output. This because modern hardware uses triple or more buffering under the hood.
To be sure check frameRenderMethod in main.cfg it should be
frameRenderMethod=FBO
or
frameRenderMethod=normal
But nether option should affect normal gui dialogs.