Hey, sorry this is a late response. I don't think Steam gives notifications for discussions for whatever reason.
Anyways, can you show me an example of what you mean by "pink boxes" and I can try to help you out? Also, unfortunately "The Hyperdrive Project" skin wasn't really intended to be played and was more used for marketing the other workshop items instead which is why I named it that. The album art gimmick was just something else I added to make it different. I'm also not sure what you mean by opting into a beta to use the skin? Sorry, I haven't really done any Audiosurf stuff in a while.
Thank you so much though for how much you care about these skins.

https://imgur.com/a/gUoIJif These are the pink squares I'm talking about.

I need to opt into a beta by clicking on Audiosurf in the library, clicking on "manage," then click "Properties," Then click "Betas" on the side. I choose a beta by choosing from the dropdown menu in "Beta participation."

*These pink squares seem to be a thing that audiosurf does when the textures of the colored blocks are outdated, thus the want for the updated blocks.

I MADE A THING! That thing is "Albumdrive!" Essentially The Hyperdrive Project placeholder skin but fit for modern times. I just need your greenlight to upload it. Also, should I send it to you? If so, how do I send the file?

Originally posted by Corrupted Audio:

*These pink squares seem to be a thing that audiosurf does when the textures of the colored blocks are outdated, thus the want for the updated blocks.

Oh this is probably because it was using a custom shader that didn't get migrated into the game when Dylan removed custom shaders.

Originally posted by Corrupted Audio:

I MADE A THING! That thing is "Albumdrive!" Essentially The Hyperdrive Project placeholder skin but fit for modern times. I just need your greenlight to upload it. Also, should I send it to you? If so, how do I send the file?

You can upload whatever you want, but just credit me if you use stuff from my skin. There's also a way to add people as contributors to workshop items iirc.
I also decided to spend an afternoon making some updates to it so you might want to try it out if that interests you.

Alright! Gonna upload it now. Curious about these updates.

Wait I was too confident. How do I upload something to the workshop?