I haven't been able to erase that blue...that was left when I put NL on. I thought I had gotten rid of ALL TPs and their Lots...
MaxoidTom terrain paints or ground covers have been a problem since Homecrafter was released and people started using them.
Very simple to replicate...make some , download some, make some lots , play with them delete them and have some FUN.
Download this file it only contains 4 terrain paints
http://thesims2.ea.com/stream.php?asset_type=lot&asset_id=247370 (accident that it is the same file as pics above)
At one time I had 147terrain paints because of them all being loaded into package files for upload/ download. put one in a lot they all get packaged.
Edit: I just put the above file in my game. Running NL. Deleted Deepwater.package and to my suprise it did not crash when entering lot. However, it did crash the packaging process.
Edit:
http://thesims2.ea.com/stream.php?asset_type=lot&asset_id=240431 is an example of how many terrain paints can come with a lot. No warning sign for them.
Put this in a game then make another lot- paint a small area with one terrain paint ....packagethe new lot to file and then see how many TPs get attached in the package. No way am I gonna do it.....been there done that.