Lesson 3– Objectives
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Transcript of Lesson 3– Objectives
DiDA – Image manipulation
Lesson 3– Objectives
• Understand how layers work• Look at the term “opacity”• Understand blending modes• Using move / scale / rotate tools
DiDA – Image manipulation
How do layers work?
Layer 4Layer 3Layer 2Layer 1
Each layer is a different part of a image. Layers can be manipulated individually which allows us to do more advanced techniques.
Layers are built up like a sandwich. They are built bottom up with the top layer hiding all layers underneath.
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Transparency and layers
• Top layers will hide anything underneath them.
• In order to “see” what is underneath a layer must contain transparent areas.
• GIMP shows transparency as a grey checkerboard pattern (see image to the right)
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How does it work
Without transparency the lotus flower covers all of the lower
layer.
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How does it work
With transparency the background is visible.
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Building images using layers
• You should always follow this golden rule• “If you add something, it should have it’s own
layer”• You will end up with a lot of layers but this is a
good thing! Honest!
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Using layers
• Task – Use the skills learnt to combine a image with a background you have created using the gradient tool.
• Watch out for artefacts!
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Adding a new layer
• Add new layer
• Deleted layer
• Duplicate layer
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Create two layers. One layer should have a gradient pattern.The second should have something else!
Advanced – Add a image with the background erased. You could use the image from a previous lesson.
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Blend modes
• The default blend mode is “normal”. This will hide anything underneath the layer which is not transparent.
• However there are lots of blend modes to try out!
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Changing mode
Changing the blend mode is easy! All you have to select a new mode from the layers dialogue.
The different modes can produce some very interesting effects so it is worth trying them all out!
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• We are going to try and create some fancy text by using the blend tools.
• Follow the steps on this powerpoint or the help video.
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Step 1 – Add some text
• The “A” tool will add text.• You can change the font type,
size and colour in the options underneath.
• Add your name to a blank image.
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Step 2 – Add a new layer
• Add a new layer and make sure it is above the text.
• Add a gradient pattern to the new layer. Make sure you select the correct layer!
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Step 3 – Changing blend mode
• Select the pattern layer you created and then change the blend mode.
• You should start to see your text appear with a pattern!
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• Find a image and remove the background.
• Blend a gradient background into it.
• Finally add the result to a second image.