[jokan10]

it could mean a 4 things -

1. You Didn't Istall it Correctly-
"If you tried uninstalling it and installing it again i doubt it is this probably unless you missed something both times - i would the installers guild carefuly or if you know someone else that plays Titan Quest you could try talking to him step by step.

2. When you made an editor map you could have messed up on the mods -
It Might be something with you mod - But you also said that you tried different characters so it probably doesn't mean that unless you used a different mod. To fix it - i don't know of a way.

3. Monsters -
I know the pattern very well and ive only seen a custom monster like that. The reason of that is because you make a monster, Make what it does and how it reacts, how fast it is, That kind of stuff. But it is because you don't make a look for the monster and so that game just replaces it with yellow and blue sqaures. This i do not also know how to fix.

4. Weapons -
I have 3 or 4 Weapons with that pattern and of course they were made it custom. It happens just like a monster gets those patterns so if you are wearing a sword that appears like that outside your inventory then that is your problem. I do not know how to fix this.

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Jokan10