As a Roblox developer, it is currently impossible to get pixels and pixel colors from roblox image assets without using HTTP service or any third-party tools.
:GetPixel(x,y) function for images would also be useful for generating terrain from height and material map images. Currently you need to either use HTTPService, or an external program (e.g. python script) to write out your bitmap as a lua array you can paste into a script. It would definitely be a time saver to be able to sample pixels off of an image in roblox.
Another thing that came to mind was raycasting. Imagine if rays could get Decal and Texture colors. Though I don’t really have a use for this, it would still be a neat feature to have and may come in handy for a lot of other developers.
If Roblox is able to address this issue, it would improve my development experience because this can open up so many pathways for developing with images.