So after placing several rocks that I thought looked good with the map, I test ingame and I see this:


In radiant it looks perfectly normal:


How can I fix this?

Thanks.

I'm not 100% sure since this hasn't happened to me.

I'm pretty sure you just need to have the rock covered by at least 1 reflection probe for that to be fixed.

U need to place a weathergrime volume, this applies a texture on the red area. Check the combine/giant for example.