Affinity Photo zoom blur filter can be found in the filter menu and the blur category
It has a small number of options such as setting the center of the effect. all very useful) especially considering how responsive Affinity Photo is (it is a super fast application). Set focus or origin point and set radius. Click Apply
Apply the effect multiple times via the repeat feature. Apply the it multiple times via the Blur menu. The only trouble with the repeat is that you can't change the settings so the origin of the effect is always in exactly the same position each and every time.
Record via Macro panel and the macro can combine the effect as well as other effects and then that can be saved to the library for future use. You can use the parameters feature to modify some of the settings.
The filter effect can be applied but you can add a post-effect touch, fade it. Fade the it via the layer menu and fade command. You can change the fade or opacity of the effect but you can also change the blend for the effect. The result may be pretty good in normal blending mode, it might even better in darken but you may find true magic with the vivid light setting.
You can create all kinds of color streaks using a combination of adding noise via the add noise filter and the effect. Re-apply the noise effect multiple times and then add the blurring effect. You can also then use the powerful adjustment layers to re-color and more.
The effect uses layers. Shape layers are vector designs and even more amazing with the effect. As shapes can be anything: stars, circles, cloud shapes, abstract art, and more. Use the zoom blur to increase the size of the layer. Use it to add additional transparency to the art. You can change the origin for the effect, you can increase the radius to beyond 100px. Create multiple shapes, blur them all using different settings. Combine them using blending modes. The effect can be modified further by using deform filter, mirror filter, etc. Add color into the shape mix as well. A perfect cocktail. he design above was created using two stars and the blurring effect.
You can also select the current image or layer and as long as it is a pixel layer, you can then use the layer menu and create pattern layer command. Select the move tool to scale etc as well s set the mirror option and that works best with this effect otherwise you would see the seams. You can also create the pattern and then scale etc and then rasterize the design via the layer menu and then apply the effect to that or use it with the live filter layer for a non destructive effect