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Floor and texture changed black?

I recently needed to reinstall the gazebo8 or gazebo9, but the floor changed black after installing with other functions working fine. I remember that the floor is light grey previously, but the floor and texture becomes black now.

The simulation is too dark to have a clear vision.

My environment is ubuntu16.04 + ros kinetic, and I used this commands to install gazebo8/9:

sudo sh -c 'echo "deb http://packages.osrfoundation.org/gazebo/ubuntu-stable `lsb_release -cs` main" > /etc/apt/sources.list.d/gazebo-stable.list' 
wget http://packages.osrfoundation.org/gazebo.key -O - | sudo apt-key add -
sudo apt-get update
sudo apt-get install libignition-math3 libsdformat5
sudo apt-get install gazebo8

Floor and texture changed black?

I recently needed to reinstall the gazebo8 or gazebo9, but the floor changed black after installing with other functions working fine. I remember that the floor is light grey previously, but the floor and texture becomes black now.

image description

The simulation is too dark to have a clear vision.

My environment is ubuntu16.04 + ros kinetic, and I used this commands to install gazebo8/9:

sudo sh -c 'echo "deb http://packages.osrfoundation.org/gazebo/ubuntu-stable `lsb_release -cs` main" > /etc/apt/sources.list.d/gazebo-stable.list' 
wget http://packages.osrfoundation.org/gazebo.key -O - | sudo apt-key add -
sudo apt-get update
sudo apt-get install libignition-math3 libsdformat5
sudo apt-get install gazebo8

The light is right and there is no error when I run it in verbose mode. I have reinstalled gazebo8 and gazebo9 many times, they all have black floor. I also tried to add 10 lights and it seems better, but it's too tedious. So I really don't know how to fix it.