How do you make a sun brushed metal effect like in the image below? I've tried motion blurring a noise layer but this gives to much blur.
Draw a circle and apply a Radial Gradient to it. I simply used a Layer Style, but you can use a Gradient Layer if you want.
Use a custom gradient with several color stops. Use the same color for the stop furthest to the left and furthest to the right. Otherwise the gradient will show a "seam".
Then create anew layer, fill it with black and add a Mask the size of the circle.
Unlink the mask with the layer, by clicking the chain icon between them:
Click the layer thumbnail so it's highlighted and choose
Filter > Stylize > Add Noise, play with settings until you get a middle-ground and then click
Filter > Blur > Radial Blur
lastly set the Blend Mode of the blurred layer to
You can then further refine the gradient:
And adjust opacities to blend things a bit better:
Acceptably finely brushed metal, even if blackened, has so fine scratches that computer screen probably cannot show them except with high zoom. But together the scratches and the light result a visible gradient effect. Thus I would start with a simplest possible conical gradient without adding any grain. Complex gradients can easily look out a folded rosette.
The gradient is 5 stop black-white-black-white-black. You can see some banding (=ray lines) due the limited accuracy.
8 bit deep colors create more rays when the brightness range is adjusted. Darkening is needed for an impression of black metal. A levels or curves adjustment layer is the simple solution:
For some internal math operation reasons the right adjustment was difficult, I didn't found a good setting.
But there's another option. Add a grey top layer and a black background. Adjust the opacities of the grey and gradient layers.
With different adjustments you get also brushed plain steel:
The gradient is opaque, so the black background is unnecessary.
With an adjustment layer you can make it glossy: