Thanks, Zoltán. Yes. We figured it out. Now the transparency mode works normally on the CLIP and LAYER tabs. On the COMPOSITION tab, it still does not work. But, as I understand it, this is due to the alpha channel that ARENA uses. In any case, with this situation you can already work. Ideally, of course, I wanted to use the transparency option, which is also managed on the COMPOSITION tab. Is it possible?
https://yadi.sk/i/Sh7rHXcdhF5Uiw
Best regards,
Andrey.