Why can't my material be found in the game?

[left saddle]

{
"materials": {
"version": "1.0.0",
"custom:particles_base": {
"+defines": [
"USE_EMISSIVE"
],
"+states": [
"DisableCulling"
]
}
}
}

[sonic frigate]

Because you're trying to use a namespace, pretty sure materials don't need them

[left saddle]

It's inheritance, isn't it?

[sonic frigate]

Indeed