I am working with masking. Here is my node setting with the mask.
And here is my node settings
And what am i getting is this.
I tried invert node and many settings. It just doesnt work. Where am i going wrong
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Make sure the cg render has a transparent background.
The render preview will show a checkered background, indicating transparency.
The mask (created in the image editor) can also by viewed, by connecting its output to a viewer node in the compositor.
For the easiest over operation, our mask is the "wrong way around". This means, we'll have to invert it. Add a [Color >] Invert node after the mask.
If you want to use multiple mask nodes, you are not going to be able to use the above node setup.
For that, unpremultiply image, alter the alpha (subtraction, max, cojoint-over, etc), premultiply it. This method is far more superior but also much more complex. Read up on premultiplication!