Clouds are an essential component of the climate in the Amazon and are responsible for redistributing water throughout the region. Such clouds are challenging to represent in mathematical models because they occur on small spatial scales and, therefore, require greater computational power. Consequently, we seek to understand, through measurements and detailed computational models, how these clouds form, organize and grow throughout the day. In particular, we seek to understand the population behaviour of Amazonian clouds and how this affects their ability to generate rain. In other words, what is the difference in the rainfall regime in scenarios with small and numerous clouds versus large and less numerous clouds? What are the mechanisms that generate these two types of scenarios? Which scenario is most efficient at converting water vapour in the atmosphere into rain on the surface?