Following this answer, I've tried to make rounded corners with dashed stroke, but the output is blurry. Is there any method to make a sharp dashed stroke in Photoshop?
Since you have access to Illustrator, the easiest way to do a dashed stroke is to create the stroked shape in Illustrator and copy/paste it into Photoshop.
Since you're unfamiliar with AI, here's a quick step-by-step:
Rectangle Tool (M)to create your shape:
With your shape selected,
With your shape still selected, Open your
Strokepalette and set the
Dashed Lineattributes to your liking.
You now have a shape with a dashed stroke. Copy it and paste into Photoshop. If Photoshop asks how you want to paste, choose "as pixels".
Note on above: Illustrator's display will likely anti-alias your shape. If you screengrab and then paste into Photoshop, you will still have "blurry" problems. If you copy and paste the object itself, you will not have this issue. You should also keep your shape dimensions in whole-pixel increments to avoid Photoshop anti-aliasing when it pastes the pixels.
Dear Pnj4 its just an assumption not a real answer just to give you a little help,
kindly attach a screenshot or anything to get proper answer
As you already created your rounded corner with dash line stroke, where ever i know your stretching or by mistake made it wrong that's why its getting blurry, try to recreate your steps carefully might be you'll get your real output without any blur and all. i am listing some tutorial for you i doubt you made mistake with brush presets.