Petr Vanek many thanks for your reply! Sorry for the late response. I added a Top Level Geomerty node with name Pixel that contains 6 beam's geometry children one for each LED, with names LED 1, LED 2m LED 3, .... The Pixel is referenced in the Fixture geometry for each pixel in the strip, using the "link geometry" feature.

Hello, Is it possible to add multiple LEDs to the "top level" pixel? Concrete we are building a LED strip that has 6 LEDs for each segment, that LEDs always have the same color output. But there can be multiple segments, for example 10. In that case there are 6 x 10 LEDs and there can be 6 different colors possible (each segment a different color), the fixture has than 6 x 4 RGBW DMX Channels. How can this be descripted in a GDTF? Can the "top level" pixel have children? Many thanks! Kurt