You can always resize each file for your grid size. Grid region is 1024 x 1024, the others are 512 x 512.
You will find all the region sizes listed below. Right click for the .Png File

To install a png file, put image in opensim/bin > in consol type: upload

All RAW and PNG's and its content must be freely distributed,
C/M/T. Resale is not allowed!




Mouse over for Region Sizes
"Varregion" are regions larger than 256x256