Make a selection on a new layer with the rectangular marquee tool (M)
Press the "G" key to select the gradient tool.
Select linear gradient and the copper preset.
Click and drag from left to right in the image window.
Tip: Hold down the Shift key to constrain to perfect horizontal line..
CMD/CTRL+T brings up the free transform tool. PC: left click/Mac: CMD Click - select Perspective.
Drag the top corner into the middle.
Click Enter/Return and you have a cone. This is also a great method to produce a triangle.
Now for the rounded bottom to make it look more realistic.
Make a selection with the elliptic selection tool.
Tip: Hold down the space bar while drawing to move a selection.
Now add a retangular selection by holding down the shift key. you will see a + which means you are adding to a selection.
Press CMD/CTRL+Shift+I to invert the selection.
Press the Delete key, and you have your finished cone
Here is the finished cone with a drop shadow added.
This is the same method I used to make the nose of my Rocketship.
To produce tenticles, just create a tall thin cone and then go to Filter>Distort>Shear Drag the line into a curve and hit OK!
About the Author:
Colin Smith is a best-selling author, trainer, and award-winning new-media designer
who has caused a stir in the design community with his stunning
photorealistic illustrations composed entirely in Photoshop. He is
founder of the world's most popular Photoshop resource site, PhotoshopCAFE.com, which boasts more than two million visitors.
With over 10 years of experience in the design industry, Colin was formerly Senior Editor and Art Director for VOICE magazine. He is a regular columnist for Photoshop User magazine, PlanetPhotoshop.com, and the official site of the National Association for Photoshop Professionals. He also contributes to a number of other graphic art publications and Web sites, such as Mac Design magazine, Web Designer magazine and Computer Arts Magazine.
Colin's graphic design work has been recognized with numerous awards,
including the Guru awards at Photoshop World 2001 and 2002, for his
work in both Illustration and Web Design. He's authored or co-authored
more than ten books on Photoshop, including the best-selling How to Do Everything with Photoshop CS (McGraw-Hill/Osborne, 2003) and award-winning Photoshop Most Wanted: Effects and Design Tips (A Press/Friends Of Ed, 2002). Colin is also creator of the Photoshop Secrets Video training series (PhotoshopCD.com).
He is in high demand across the United States as a lecturer, presenting
his Photoshop techniques to Web designers and other graphics
professionals across the nation.