HWtn wrote:
I am looking for a rainbow to lay over a landscape (as a second layer).
any idea?
HWtn
First create a new layer above your landscape.
Next, change your paintbucket over to the gradient tool, and using the preferences at the top of your screen, click to edit the gradient colours.
One of the presets in there should be called "Transparent Rainbow". Select this one.
Now drag all the sliders all the way over to the right. Bunch them up real close, but keep then in the same order they were in to start with. You want to create a gradient which is transparent for about 90% of its length from the left hand side, with the rainbow crushed into the remaining area.
Once you’ve done that, change the gradient from linear to radial.
Now, go back to your image, with the new layer selected, look at the landscape and visualise the rainbow. Imagine it as a sweeping curve, and try to visualise where the centre of that curve would be.
Place your cursor on that point, click and drag out the gradient tool to where you visualised the outside of the rainbow to be. Release the mouse button and you’ll have a rainbow.
The rainbow isn’t very realistic yet. It’s colours are too bright and harsh. So simply reduce the layer opacity to a level between 15% and 20%. Use your best judgement here.
Lastly, you need to do something about the ends of the rainbow. Rainbows in nature fade out and the ends disappear into nothingness. So set your eraser tool to a good wide radius, and drop its hardness to zero.
Now simply dab the eraser tool on the ends of the rainbow until you get the fade-out effect you want.
If done right, the effect should look something like this.
http://www.norfolklupusgroup.co.uk/misc/rainbow-demo.jpg