Jason Lister
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this was made like 3 years ago so im assuming that an update in Photoshop makes this not work anymore but
on step 3 i can do this part:
but it is impossible to do this part as its grayed out only way to do this is to select the quick selection tool then click on marquee then you can right click on save selection
Deleted sentence as it was just plain rude.
Inkz
Step 1
Ok after we create our image using this background the first thing I do is duplicate the background three times.
I name the layers starting at the bottom; "Background", "Near Edge Refraction", "Top Surface Refraction", and "Far Edge Refraction".
Then I click the eye icon and turn off all three "Refraction" layers, we will use those later to bend a little light.
And, Let's Highlight our Background layer and click on the little lock icon to protect the background layer so we don't accidentally draw on it.
Step 2
On the color pallet I select a light/med blue as my foreground color. My choice was #008caf.
Select your top layer (should be the Far Edge Refraction layer) so that the new layer will be created at the top of the stack.
Click on the New Layer icon and name this new layer "Top Surface".
Then use the pen tool and just click out a few points to create the outline of the piece of glass.
Right click and select Fill Path, when the dialog box opens just click OK to use the Blue foreground color.
Set the opacity for this layer to 70% and set the Fill to about 30%.
Step 3

Create a new Layer and call it "Near Edge", put this layer under the Top Surface layer.
With this new layer selected and active, Ctrl + Click on the "Top Surface" image icon, this will select the Top surface.
Go to Select / Save Selection, Choose "Save as a new channel" and name it "top".
Make sure the "Near Edge layer is still selected (Highlited) and then select any marquee tool. Now you can move the selection with the arrow keys.
tap the down arrow 8 or 10 times. you will see the selection moving but the "Top Surface" Should not be moving along with it.
Save the selection again in this new position (we'll need it in a few mins. Save as a new channel and call it "Shifted".
Now go back to Select / Load Selection and choose "Top" in the channel drop down selection, choose "Subtract From Selection" and click OK.
This will delete the "Top" selection from the selections current position and leave you with a small selection which will become your "Near Edge".
Now select the pen tool and we need to fix the ends of this "Near Edge" Selection where they don't meet the "Top Surface" correctly.
Using the pen tool create the two small triangle (in the blown up sections of this image to connect the corners of the "Near Edge" with the corners of the "Top Surface".
Then right click on either triangle and select "Make Selection", when the dialog appears put a check in the "Add to Selection" option and click OK.
Our "Near Edge" selection now meets up with the "Top Surface" Correctly.
Use the Bucket tool to flood fill this selection with the same Blue (#008caf) color.
Set the Opacity to 75% and set the Fill to 90%.
on step 3 i can do this part:
Code:
Create a new Layer and call it "Near Edge", put this layer under the Top Surface layer.
With this new layer selected and active, Ctrl + Click on the "Top Surface" image icon, this will select the Top surface.
Code:
Go to Select / Save Selection, Choose "Save as a new channel" and name it "top".
Make sure the "Near Edge layer is still selected (Highlited) and then select any marquee tool. Now you can move the selection with the arrow keys.
Deleted sentence as it was just plain rude.
Inkz
Step 1
Ok after we create our image using this background the first thing I do is duplicate the background three times.
I name the layers starting at the bottom; "Background", "Near Edge Refraction", "Top Surface Refraction", and "Far Edge Refraction".
Then I click the eye icon and turn off all three "Refraction" layers, we will use those later to bend a little light.
And, Let's Highlight our Background layer and click on the little lock icon to protect the background layer so we don't accidentally draw on it.
Step 2
On the color pallet I select a light/med blue as my foreground color. My choice was #008caf.
Select your top layer (should be the Far Edge Refraction layer) so that the new layer will be created at the top of the stack.
Click on the New Layer icon and name this new layer "Top Surface".
Then use the pen tool and just click out a few points to create the outline of the piece of glass.
Right click and select Fill Path, when the dialog box opens just click OK to use the Blue foreground color.
Set the opacity for this layer to 70% and set the Fill to about 30%.
Step 3

Create a new Layer and call it "Near Edge", put this layer under the Top Surface layer.
With this new layer selected and active, Ctrl + Click on the "Top Surface" image icon, this will select the Top surface.
Go to Select / Save Selection, Choose "Save as a new channel" and name it "top".
Make sure the "Near Edge layer is still selected (Highlited) and then select any marquee tool. Now you can move the selection with the arrow keys.
tap the down arrow 8 or 10 times. you will see the selection moving but the "Top Surface" Should not be moving along with it.
Save the selection again in this new position (we'll need it in a few mins. Save as a new channel and call it "Shifted".
Now go back to Select / Load Selection and choose "Top" in the channel drop down selection, choose "Subtract From Selection" and click OK.
This will delete the "Top" selection from the selections current position and leave you with a small selection which will become your "Near Edge".
Now select the pen tool and we need to fix the ends of this "Near Edge" Selection where they don't meet the "Top Surface" correctly.
Using the pen tool create the two small triangle (in the blown up sections of this image to connect the corners of the "Near Edge" with the corners of the "Top Surface".
Then right click on either triangle and select "Make Selection", when the dialog appears put a check in the "Add to Selection" option and click OK.
Our "Near Edge" selection now meets up with the "Top Surface" Correctly.
Use the Bucket tool to flood fill this selection with the same Blue (#008caf) color.
Set the Opacity to 75% and set the Fill to 90%.
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