Computers and Software > Raster and Vector Manipulation Programs, and How to Do Stuff in Them.

Choking underbase in photoshop

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3Deep:
Can some reteach me about choking a white underbase in photoshop, been a while  since I've done manual seps in photoshop.

Frog:
Wouldn't one way be to simply add a stroke of a different color?

ebscreen:
If base channel is already made, load it as selection (ctrl+click channel)
select->modify->contract by whatever you want. Select->save as new selection.

PS gets weird with inverting selections in a manner I still can't figure out, so if
your new base channel saves as inverse just deselect all (ctrl-d) select the channel and hit ctrl-i.

Nation03:
If you do things in Layers and not channels this is how I do it.

Right click the layer you want to choke, click select pixels, then go to top and click Select > Modify > Contract. Enter how many pixels you'd like the choke to be and then you can cut the layer and delete the excess outline.

At least that is how I do it, I'm sure there are other ways but this has always worked for me.

Sbrem:
Though I do channels, it's pretty much the same for layers, you're selecting the image, NOT the background, and then Select, Modify, Contract... how many pixels contract is determined by your image resolution. At 300 ppi, I contract 2 pixels...

Steve

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