neuron

The surface of one neuron in the brain's instanced neuron cloud. It lights itself from the instance data lane 0 that the cloud_gather kernel fills each frame with the activity of the neuron this slot draws (activity trace, normalised membrane, spike flag) and the superclass colour the module writes once (lane 1): dim at rest, brighter as the membrane depolarises, flaring well above 1 on a spike and fading with the trace, which is where the scene's bloom picks it up.

rest_brightness, membrane_brightness, spike_brightness and rim_brightness set those four levels on the material.