I created a particle system and passed some UV values using vertex color, and it looks like it works when i set the base color to be uv values.
in example (they are each individual particles).
but when i try to sample those uvs with a texture, they simply don't work. i have no idea why. the uv looks identical to the colors of the uv node in shader graph, and its range is 0-1.
the other image attached should be sampling a texture of an arrow pointing upwards, but it looks like that.