Environmental Effects poorly rendered, and purple boxes appearing at character screen

Something I hardly noticed during Act 1, save a burning building in the Dark Wood. There appears to be a graphical layer that is not rendering properly, showing as a somewhat pixelated solid wash. Also, after trying to move around graphic settings, I am now seeing magenta boxes in certain areas, like under my character’s arm. I am playing on a Lenovo Yoga 7 15ITL5 that is barely two years old and is fully updated. I do not believe this is a graphic or hardware issue. No other performance issues like framerate drops or crashing…just that one layer.