Does a glass cover over an ancestral tablet prevent ancestors from receiving offerings?

A glass cover over an ancestral tablet is not a reason to assume ancestors cannot receive food and rush to lift it. I do not agree with imagining departed souls as living bodies confined by glass and unable to smell anything outside.

A student once sent a video claiming that ancestors receive food through its aroma and therefore cannot receive offerings when the tablet is covered. In my understanding of faith, speaking of receiving food's energy makes sense. But extending this to a claim that glass necessarily blocks ancestors is another matter.

I asked in response: under that logic, would the tablet's wood, the paper bearing the names, and even grave earth, stones, and urns also have to be opened individually? This rhetorical question tests the claim. It is not an instruction to dismantle tablets, open graves, or uncover urns.

Covers protecting statues and tablets also help keep dust away. Their presence alone cannot establish that a deity's radiance is dimmed or offerings cannot reach their recipients at all. Understanding ritual requires distinguishing the purposes of physical objects from faith-based understandings of souls and energy. Do not turn imagined restrictions into taboos that frighten every family.

I also explained then, from an energy perspective, that light can pass through a cover. It therefore does not dim a deity's radiance or prevent departed souls from receiving offerings. This is my understanding of unseen energy within faith, which is why I do not agree with treating a glass cover directly as a wall blocking offerings.