Hi,
I am trying to create something that has this shape.
Is it possible to create something like that in Roblox, and if so, how would you do it?
EDIT: Just to make it clear. I want to achieve the shape of the button. I don’t care about the effects and coloring.
You would need an external image editor.
I edited my post to clarify that I only care about the shape. I know that the effects are quite complicated and need something more advanced.
You’d still probably need an external image editor just for the shape.
If you mean out of Parts, it’s pretty easy to block out with Primitives.
If you mean an image, all images have to be made in image editing software - Roblox doesn’t have that functionality internally.
I mean the image. I was hoping to achieve this effect by using multiple frames or some kind of clipping. 
You can, using frames and rotation property of them
You could probably upload a triangle (a right, isosceles triangle) as an image/decal. Then use what @Aotrou said in post #5 to make the desired shape. You can also stretch the triangles in Studio so that it looks more like the shape.
I wonder if there’s a feature request for drawing UI (selecting points and creating shapes out of it) that’d be pretty cool like art tools or whatever. If there isn’t then I might make one.
edit: Sorry, to answer the question you have to upload an image from an editor program
