I'm trying to merge some LiDAR tiles together but when I do, the clarity of the image drops, so I think that means I am losing some data.
How do I merge the tiles and keep all of the data and the clarity of the LiDAR?
Legends show the merged file has a wider range of values (0 to 74.71 m) than each tile individually (which is expected), while the extreme colors in the pallete are the same (black to white). This will make color contrast in the merged file less apparent. See picture below (merged file is marked in red; tiles in green):
However, it seems none of your tiles have values near or equal zero, so maybe
no data values were converted to zero, or somehow they are appearing in the legend as zero. Check the layer symbology.