If we now summarize all our reasoning, we need come to the following:
For individual capture, we need to use the icon of the corresponding group, adding some sign to it to understand that this is a capture, for example:
This will preserve the familiar pictograms and color coding of the blocks.
More aesthetic options:
2. The cleanliness and symmetry so delicious!
For combined capture, considering two and more icons make it clear that we are seeing a capture, we can really abandon the globe icon, and accommodate up to 4 well-readable icons:
version with globe, less clean:
…the initial color of the captures blocks is gray, аlso interesting: