Why do we need to convert it into a Smart Object? It's because, when a filter is applied to a normal layer, it remains a normal, static filter. So how do we apply Gaussian Blur as a Smart Filter? For that, we first need to convert the layer to a Smart Object. By applying Gaussian Blur as a Smart Filter, we're giving ourselves the option to go back and fine-tune our sketch effect later rather than locking ourselves in with our initial filter settings. They allow us to easily go back at any time and make changes to the filter's settings without any loss of image quality. What's a Smart Filter, and how is it different from a normal filter? Well, Smart Filters are just like normal filters in Photoshop, only smarter! What makes them 'smarter' is that while normal filters produce static results (that is, they make permanent changes to the pixels on a layer), Smart Filters are non-destructive and remain fully editable. But rather than applying it as a normal filter, let's apply Gaussian Blur as a Smart Filter.

In a moment, we're going to create the main part of our sketch effect by blurring the layer using Photoshop's Gaussian Blur filter. Step 6: Convert The Layer Into A Smart Object Other tools in this set are used to add and remove anchor points. Changing the blend mode to Color Dodge turns the document temporarily white. It lets you create straight lines and smooth flowing curves with greater precision.

Adobe photoshop drawing