Add a Sprite3D demo

[chocola-mint]

There's no demo that uses Sprite3D or AnimatedSprite3D.

I was working on a rendering optimization PR involving SpriteBase3D and wanted a more realistic use case to test for edge cases, (particularly when multiple Sprite3Ds change their colors and get destroyed) but realized that there's no demo here that uses Sprite3D or AnimatedSprite3D.

The most common use case for Sprite3D would be either a Paper Mario-like or the "HD-2D" artstyle. A Paper Mario-like would likely be the better idea considering Sprite3D's current feature set. (Notably this means no need for normal maps, reducing the project's complexity) Though if Sprite3D ever gets official normal map support, an HD-2D artstyle might be better.

[yuantianle]

I am interested in demoing this (my first demoing project) :) Thanks!
@chocola-mint @Calinou

[Calinou]

I am interested in demoing this (my first demoing project) :) Thanks!

Feel free to open a pull request for this 🙂

I suggest copying the 3d/labels_and_texts/ demo as 3d/sprites/ and modifying it to use Sprite3D/AnimatedSprite3D instead of Label3D/TextMesh.

[yuantianle]

Trailer is here! @chocola-mint I am also a big fan of Super Mario. I really like SUPER MARIO KART THOUSAND YEAR 😄

[yuantianle]

@Calinou, I have uploaded the project. Please let me know how to upload the project to the assets library, or should it be done by the admin? I have left the space in the README for the URL. Thanks!

[Calinou]

Please let me know how to upload the project to the assets library, or should it be done by the admin?

I'll handle the asset library upload once I update demos there to 4.4. The corresponding PR needs to be merged first anyway.