Grass appears clumpy and low res in packaged game

Hello there. I have plastered the landscape of my game with grass (grass tool). Now in the editor it all looks fine but when I package the game and load into that map, the grass looks very clumpy and low res.

I have a feeling that this has got to do something with the mip maps, because if I change the “Mip Gen Settings” of the corresponding texture to “No Mipmaps”, everything is working fine. But is that really the solution? Aren’t mip-maps important to improve performance?

Hey, did you find out what was causing this issue?

I think I pumped up the Texture streaming pool size but I am not really sure anymore, sorry.