I need  to create immovable objects like colored walls in my gazebo world. I don't think that gzbuilder utility can help me because i need  these walls must be colored.
I have tried to create a simple solid but when robot bump against it, the  solid  "fly"  in the  world.
I have also tried to set solid's mass and solid's friction but even if it's more stationary, it always move in the world.
Thanks in advance for answer