Is it possible to cast spells through planar portals, like those created by the gate spell or a portable hole?

There are some cases such as Rope Trick, that have explict language to block this. Gate and Portable Hole have no such language.

There is this answer, but it is for D&D 3.5. In this Q&A multiple answers argue that casting into a portable hole is not the same as casting through a gate in general. This one, argues gates are much more varied in nature than a simple portable hole opening, and this one even argues that extradimensional spaces are different from planes to begin with.

This may mean the answer is only "we can't say in general, ask your DM", but clearly the answer is not simply "look how it works for a portable hole", as in this answer.

  • \$\begingroup\$ I had not found the other question (was looking for gate spell when searching). I agree it is a duplicate. Should I delete the question or is it a useful question to leave around? \$\endgroup\$ Commented Mar 19, 2022 at 10:03
  • 2
    \$\begingroup\$ Duplicates are generally fine to keeep around. \$\endgroup\$ Commented Mar 19, 2022 at 11:19
  • 1
    \$\begingroup\$ I don't think that the arguments make this question any less of a duplicate, unfortunately, the answers may make it less conclusive than desired. \$\endgroup\$
    – Akixkisu
    Commented May 9, 2022 at 19:38
  • \$\begingroup\$ @Akixkisu, while I do not understand this conclusion, I can add a bit more direct evidence when I find the time. Let it be as is for now \$\endgroup\$ Commented May 9, 2022 at 20:55


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