For Movies, as long as you're using "start_image" and optionally set the scene to that same image, there shouldn't be any issues with the checkered image.
For image sequences, using "renpy.start_predict()" before showing it, should preempt most issues as well.
Ever little bit can definitely help, but regardless of how a dev tries to compensate there's always edge cases. The above to snippets *should* mitigate some issues, but there are always edge cases in the variability of systems. There are a number of player-side issues that can cause issues to, such as not disabling power saving within Ren'Py... which can surprisingly have a large impact on *
some* systems.
When Cyberpunk 2077 first released, other than the T-Pose when driving downtown at high speed, I had no other crashing, noticeable bugs, quests break mid-way, or phone issues. And I
don't have a top tier system. But many, many, other players had constant crashing, bugs, and disk streaming issues. Was a nice change of pace to be the edge case for not having problems.
