1
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This one up and we want to explore the add subtract intersect lighting ducking and so on.

2
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Push a faultless add on other mask so you can select the layer and using the shape tool.

3
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You can now create another mask here.

4
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I'm creating this mask just for demonstration.

5
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I want an intersection here.

6
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If you take the second mask and you give it subtract Heriot so it subtract itself from all the other

7
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umask above it.

8
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If it put a stop it was substract from all that is above which is the whole layer.

9
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You know this is what happens Cathead is odd.

10
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So the cathead is are good.

11
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This is the concept of subduct.

12
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It will just remove itself from what is about if you go for example to intersect so much will intersect

13
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itself with all the above masks including the very last.

14
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A third mask for example just over here you notice.

15
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Now if I take my stool put it on top of my squad.

16
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So mask one will intersect with all the above masks if mask is under it should not intersect just what

17
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and was above.

18
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So the lingering order is from top to bottom.

19
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This book must go to it.

20
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So now you are adding all the masks.

21
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Not this one two three stick masks three and give it that for example it acting somehow like the intersect

22
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but it's extruding itself also.

23
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So Musk's too will act as intersect and exclude itself.

24
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Again something like this.

25
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Then you have the option difference for my stew it would make the difference between itself and all

26
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the other masks.

27
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So what's the rule of working here.

28
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Well it gets very complicated if you start changing many of them here.

29
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For example this one is put on.

30
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And this one in a darkened studies like this.

31
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So there is no general rule here but the concept is that you can and you can remove you can intersect.

32
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You can Darkon.

33
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That means removing itself and you can make the difference.

34
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For example come and play around here.

35
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It's very interesting and I'm sure you will get very confused because until now I get confused and don't

36
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forget about the Inv. now.

37
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So is this what will happen.

38
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So really it's fun to come and play around with these attributes here and get used to them.

39
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Thank you for listening.

40
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I'll see you in the next lecture.