[Bug?] 0.2111 Cursor light source not updating every frame when using upgrade tile tool?

[HofNerd]

To me it looks like dragging the upgrade tool over some tiles causes the cursor light source to not update its position for a few frames shortly after setting one or more tiles to be upgraded:

(I hope I am seeing what I think I am seeing?)

 

[JohnSlugDisco]

logged. I was not able to replicate it so maybe it only happens when there are a lot of ants? Either way passed it on to Matt

 

[Matt]

I've been looking into this this morning. Haven't been able to recreate it, or find a reason. Theories include:

• maybe the UE4 engine is receiving cursor position updates out of sync with the OS (which effectively controls the position of the cursor you see).
• maybe the UE4 engine is skipping a variable update on the graphics card for the light position, as some form of optmisation. A driver could also be responsible for this.
• Maybe there is a collision with something that blocks the tile-trace in very specific locations at specific times.

The first two are pretty hard for me to test without your hardware setup, and so far I have seen no further suggestion that the last one is true. If anybody finds any more clues, let me know!.