I need a little help.

[Kob31]

I'm trying to make these borders with these corners but I got lost here in photoshop could anyone tell me where to start?

I need you to have those bevelled details:



I thank you for your help.

 

[gedstar]

Hi and welcome to PSG

First thing you need to do is extend the canvas, go to Image and Canvas Size



Then make a selection with the rectangle marquee tool



Hit CTRL + J to copy that to a new layer and then hit Shift + Backspace to open the fill dialog



Select color and choose the color of choice, then CTRL + T on that layer to enter free transform



Right click and select perspective



Then drag the lower left corner handle to the right until you get this



Result



You can then CTRL + J that layer to copy it and again hit CTRL + T on the copied layer and then right click and select flip vertical and hold the shift key and move it to the lower part of the image

Final result

 

[Kob31]

thank you very much for the explanation, it helped me a lot and I already managed to do it here.
cheers!

 

[Trevor Dennis]

Just a thought, but if you copy the background layer first, and then add canvas and fill with 50% (or whatever), then you could simply use a Bevel & Emboss layer style to give you the mitered corners. I set the angle to 120° in this one with Chisel Sharp.