Week 6a
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Here are some masks and images I created by applying what I learned in this lesson.

Here are two images - one of a green landscape and the other of the Philadelphia skyline, both cropped to the same size.

I then created a third image, same size as the two above. I added some vector text and a tube called "ivy". On the tube layer, I changed it to grey scale, increased color back to 24 bit and added an adjustment layer to make the greys a bit darker. I then merged all.

I copied the skyline picture as a new layer on top of the landscape. On this skyline, I applied "mask, new from image" and used my newly created image, with source luminescence to come up with this.

Finally, I created another new mask by using another picture tube of a jewel, below left.  I rotated it, changed it to grayscale and increased the color to 24 bits. Then, using manual color correction, I selected the lightest part and set a target of pure black. I then saved the resulting image as a mask, inverted, below right.

Here's a picture of my father's cat using the mask, above.