I tried to recreate that technique with DirectWave by importing a kick and automating the "loop end" knob. But instead of fading smooth from the synthy sound to the kick, the loop end marker jumps in particular steps, which you can unfortunately hear pretty good. I attached my attempt where you can hear those marker jumps when the sound goes "down".
I only experienced this with automation. When I played the loop and turned the knob manually, everything sounded fine and smooth, how it should be.
Is it possible to automate the loop end marker in DirectWave smoothly without those "jumps" or do you know other plugins/approaches to create this effect?