Output of one single picture at high resolution via function Create picture sequence does not produce the desired result as some elements of the image blend are missing in the picture. This is probably due to the fact that the graphics memory could not accommodate all the necessary media or that enabled mix grouping is inappropriate.
Solutions:
For picture output, reduce the resolution at Width and Height on the dialog page Picture sequence. See Creating picture sequences.
If you want to use track variables for alpha control in your project you need to enable the corresponding track. See Controlling track contents via triggers.