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How can I simulate a diffusive process with ROS

I need to know if might be possible to simulate a diffusive process i.e. to set some environmental parameter like light or brighteness of an infrastructure like a wall, and detect with a sensor (vision sensor).

Thanks in advance

If you’re looking to simulate processes you’ll want to use a simulator. There are several with ROS integration, for what you’re looking to do I’d suggest looking at using Gazebo. To that end I’d suggest you ask for help on or on one of the other simulator’s forums.

Please note that we ask that people ask questions about ROS on following our Support Guidelines: I’m redirecting you to Gazebo’s instance to save you another step.