every part of the flash, heard from where it is

A thunderclap from a library is one flash, from one direction, once. Thunder makes a storm whose every strike rolls across the sky.

A thunderclap is not one sound. The lightning channel is kilometres long, and each part of it is heard when its sound arrives — that is the roll. Kuules Thunder builds every flash that way: a stroke to the ground with its branches, or a run through the cloud, with the sky's scatter under it and the land's echoes after it.
Sometimes you feel it. Now and then a pressure front comes through in the felt band, a push and a kick at 45 to 70 Hz. Thunder runs on the same engine and field as Kuules Rain, so the two agree when they play together.
Every flash is drawn on the map as it rolls.
Each piece of the channel is spread and dulled by kilometres of air, not by a knob.
The low push you feel as much as hear, now and then.
The same field, calibrated together.
121 channels in CLAP, up to 7th order in VST3, ambiX (ACN/SN3D) throughout.
A ring round every knob: drag it and the knob moves — by an LFO, a wandering drift, a follower of the track or an envelope. The knob stays where you set it; the ring shows the movement round it.
Move any control from your own controller; one knob can drive several, each with its own range.
Fixed cases rendered and compared on every build, so a change that should be silent is proven silent.