Texture Loss
Texture loss can occur for a variety of reasons and the solution will be different for each and every user. Below are some of the most common solutions to reduce texture loss.
Increasing the Extended Texture Budget in Settings -> Graphics Settings. The member should have this as high as possible while keeping the Video Memory bar in the Green to low Yellow.
Decreasing general graphics settings, as these don't impact the looks of FiveM significantly it is best to take the slight quality decrease to run the game smoother.
Graphics Packs may also cause texture loss, if after the other two solutions the member is still experiencing texture loss instruct them to uninstall any graphics packs that they may have.