Currently, materialSources assume that we can't/shouldn't sample particles in a void region. This can be worked around by defining some low density material where we want to sample particles instead of void. However, it feels like an unnecessary restriction. I propose removing it unless there is some good reason why we should generally prevent sampling in a void.
Currently, materialSources assume that we can't/shouldn't sample particles in a void region. This can be worked around by defining some low density material where we want to sample particles instead of void. However, it feels like an unnecessary restriction. I propose removing it unless there is some good reason why we should generally prevent sampling in a void.