My setup is four matrixes with 1024 LEDs each, using FastLED:
FastLED_NeoMatrix matrix = FastLED_NeoMatrix(leds, 32, 8, 4, 4, NEO_MATRIX_TOP + NEO_MATRIX_LEFT + NEO_MATRIX_COLUMNS + NEO_MATRIX_ZIGZAG + NEO_TILE_TOP + NEO_TILE_LEFT + NEO_TILE_ROWS + NEO_TILE_ZIGZAG);
I2SClocklessLedDriveresp32S3 driver;