Blurry RVTs after camera jump

When using Runtime Virtual Textures (RVT) on landscape in UE 5.5+, nearby tiles may remain blurry (low-resolution mips) after launching PIE or making large camera jumps (e.g. via bookmarks or viewport movement), if the camera moves a significant distance. Blurriness resolves after moving away and returning, or after any action that triggers a virtual texture invalidation.

Notes:

• The view mode Virtual Texture -> Pending Mips shows no pending mips for affected tiles.
• If reproduction is done using camera jumps, the Pending Mips visualization mode shows pending updates for the affected tiles for 1-3 frames. However, the tiles are still low resolution after the updates.
• This probably affects older versions of the engine too, but has not been tested.

• Enable virtual textures
• Setup an RVT on the landscape
• Setup the fixed pool size settings under the Virtual Texture Pool category of project settings to be big enough that the pool doesn’t have to resize (I used 160MB in my test). (This step gets rid of extra invalidations that can occur when you move the camera slightly which can hide the issue)
• Place the editor viewport camera far away from the player start
• Relaunch the editor (ensure that the editor starts at the far away location you previously placed the camera at)
• Launch PIE
• Observe that nearby tiles have low resolution mips loaded.
• This can also be replicated using camera bookmarks to jump the camera a large distance without playing.