Inconsistent Opacity / Transparency Treatment on SurfaceAppearances between Play Solo and Edit mode

Identical SurfaceAppearance objects, with identical ColorMap and all other properties, show completely differently in Edit mode and Play Solo. See Examples below (Edit first, then Play Solo/Run (both have same issue) in the examples):

E.g. 1

E.g. 2

Expected behavior

I, quite reasonably, would expect that the meshes would appear identical in Play Solo & Edit mode. This is a genuine issue, among many other issues like this I come across when working on Roblox games all the time, with a lack of consistency. This uses up massive amounts of time because you are forced to play through every feature on every type - edit mode, play solo, then the game itself, and then every platform of the game. I don’t know what is causing this. I have attached an .rbxl file in the private staff-only section.

This type of issue is often the reason I lose motivation when working on new games.

Edit: I have identified the cause of the issue, it’s graphics rendering settings. On higher rendering settings, the level of transparency appears to be higher, which is… confusing? I presume its to do with the resolution the texture is being rendered at, but I’m confused as to why this would cause such a large change in the opacity/transparency.

A private message is associated with this bug report