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I'm more interested in your opinion about the cloud section itself though.

There's nothing wrong real-life geography but it should be a secondary priority IMO. Will elaborate on that later.

As for the cloud section, I'll look into that.

I mean just look at the Japanese sea topography, it has no place for a flat ocean floor like this.

You know that, and I know that, but it isn't necessarily the case that Horikoshi knows that.

There is a simple way to figure out how deep the Ocean is, and that's shown when Star and Stripe slams the combined laser weapon down on Shigaraki, pinning him to the seafloor. We know how big the laser is from the canonical height of Star and Stripe's avatar, and we can see how much of it she stabs into the Ocean.

Calculating the ocean depth is like a manga using Mt. Everest for feat, and then us measuring the Mt. Everest with an object that doesn't really exist in real life.

Because while the Star Giant have an official height, the laser does not.

Actually... this is straight up impossible, the laser literally gets longer inside the ocean than when Star was holding it in the sky.

This ain't gonna work.

I think that's due to an issue of perspective of the panels.

That panel is the only picture that shows the full laser, and with the end of the laser being closer to the camera than the bottom, I don't think there's feasible way to measure it accurately.

So yeah, you sure you just don't want to use the ocean depth? There's no need to fight with an extremely inconsistent, sometimes not even a meter thick laser.

I also find it hard to believe that Hori didn't look for information about the ocean floor before actually drawing it, when we know that he usually relies on real places to make island locations in his story (for example, the island that is 200 kilometers from the coast does actually exist in real life).

Drawing the ocean floor blindly does not sound very practical.

Hello, could you evaluate the rest of my calc?

Ah, thanks for the reminder. Been unwell past couple days. Will re-evaluate today.

Ah, right. You were mostly concerned with the cloud section, right?

To be honest one potential problem may be that though you have calculated the volume of the "hole in the sky" that is formed after the explosion, that doesn't necessarily mean the entire volume of the sky in that area was overcast with clouds. It's an area almost 400 kilometers across and we don't have any visuals to support that the entire volume was filled with clouds prior to the explosion.

That there is a ring of clouds around the circumference of it only shows that there were clouds in the area. It's not the same as the entire hole having previously been cloudy.

Do you get what I mean?

that doesn't necessarily mean the entire volume of the sky in that area was overcast with clouds.

Click to expand...

We can see that the hole in the sky was only as big as the explosion during this panel, meaning there was actually a layer of cloud before it was dispersed.

And even if that weren't the case, it would be irrelevant as I'm only calculating the volume of air that pushed the clouds in all directions.

That entire area was most likely filled with clouds given the way it was dispersed, but as I said it's irrelevant, we only care about the air itself pushing the clouds.

If you don't get I am saying, let's say there's an explosion in the sky, and this explosion pushes a cloud that was 1 kilometer from the explosion, meaning the explosion pushed all the air between it and the cloud in order push it.

That's how cloud calculations work, the cloud itself practically doesn't weight anything, it's the air pushed that actually matters, and it's the reason why cloud calcs are inflated.

I think I get what you're saying but doesn't the mass calculation you're using calculate mass of both air and cloud? Or is it just the case that the cloud accounts for less than 1% of the mass anyway?

Also, on the topic of cloud calculations, is this even remotely accurate when it comes to physics? What kind of explosions create a perfect vacuum in the air several kilometers across?

Or is it just the case that the cloud accounts for less than 1% of the mass anyway?

Click to expand...

Exactly this.

is this even remotely accurate when it comes to physics? What kind of explosions create a perfect vacuum in the air several kilometers across?

Click to expand...

While an explosion does push some air, since otherwise the cloud wouldn't move, it doesn't have to push all the air in order to move it, meaning a vacuum is not necessarily created unless the air was moved really fast.

DonTalkDT is aware of this, but still choose to use the full density of air, for lack of better options.

It may be the lesser of two evils, but if cloud calcs are notably unreliable based on this I feel like their ought to be another solution. Or at least a compromise solution like "calc the results from moving the air and calc the results from moving just the clouds and average them together". That probably wouldn't work well either tbh.

But if logical consistency issues become too extreme, then what value is our calcs?

It's not like I didn't try to change things, but your idea would go against our own established conventions, which I don't think it's allowed.

Ignoring the cloud method for My Hero Academia is something I myself proposed a long time ago, in hopes that things would change eventually, but they didn't, and probably never won't.

I see ... When I get more spare time, I may throw my hat in the ring and try to get those standards changed

Honestly, I think that's a bad idea, DonTalkDT doesn't want to change his mind (that thread wasn't even the first time we tried to convince him and others about the air density) and he probably knows more about this than you and me included.

I'm not sure why he is so reluctant to change his mind, I'm not calling him biased, but it's something that I noticed in both threads this subject was discussed.

Spoke to DT about it, and outcome was just to leave it as is for now.