I found a image inside the default.zip texture pack of ClassiCube.

It was called "icons.png".

It included the + thing that we see in the game.

However, there's some other stuff in there.

There's some heart sprites, armor durability sprites, AND the sprites that you see before drowning in the real Minecraft.

Here's the image:

You have to extract the default.zip texture pack to find this.

These were included even in the original classic, since there's unused assets that were used in the survival test version.

So that's why it exists.

Yeah i kind of think thats for survival like if you wanted to add a survival plugin that would be like the texture for it.

8 hours ago, Goodly said:

These were included even in the original classic, since there's unused assets that were used in the survival test version.

That isnt survival test goodly. The hearts look quite off to normal minecraft hearts.

8 hours ago, Goodly said:

These were included even in the original classic, since there's unused assets that were used in the survival test version.

Wait maybe your right its just the lighting. I pressed the picture.

If i can code, i would make a plugin that makes you able to switch to survival mode (in singleplayer) with a command.