In the very scan you provided regarding the form of the Space Beyond, you contradicted this claim. As a reminder, earlier in this thread, this is the scan you provided of what the Space Beyond looks like.
This would not simply be depicted as a "black spot" if scaled up in such a form. In fact, it actually seems to rather resemble what the Fabric of Existence is depicting. Again, by your scan - the two are quite similar.
Furthermore, even if the Space Beyond was theoretically entirely dark from end to end (which visibly isn't the case), the colours used to represent the Fabric of Reality are entirely warranted to be adjusted under artistic liberties. In fact, it appears they are. This is shown
here, for one instance. Neither arguing that the Fabric of Reality unquestionably follows this particular pattern, nor arguing that the Space Beyond could not demonstrate this pattern, holds water.