Transparent circle New Super Mario Bros Wii effect

[Mdsx]

How exactly can we do this using MMF2 (non HWA)

See the transparent circle that reveals hidden areas vvv

[Looki]

Haha, just played this game today for the very first time.
There really is no efficient way I can think of. I would know of ways to do this in HWA using effects.

[Mdsx]

Any inefficient ways? I would only use it sparingly.

[N64Mario]

Wouldn't you make use of layers to make this sort of thing? o_O

[Looki]

Sorry, no. I think there would be a way, but it's just too complex and would result in very low fps.
Why do you insist on using the software renderer?

[Mdsx]

You are right I'm restricting myself for no reason. How would it be done in HWA?

[Sam_Dillard]

The "Hole" shader does exactly that

[Looki]

I actually made a better one which also uses pixels as unit. So the radius is not relative to this. It also has less features.

Uploaded it here, http://clickteam.info/looki/Shaders/CircularMask.zip

And here's a simple example.
http://clickteam.info/looki/Examples/CircularMask.mfa

[Pixelthief]

Yah the 'hole' pixel shader or just simply using the alpha of a layer and making it transparent around the player- its not at all a complicated effect

[Looki]

Can you elaborate? Sounds like I don't know of that technique.