The following video tutorial will walk you through the entire process - demonstration included - in less than 2 minutes:Ĭontinue on if you prefer the written instructions. Now that we’ve briefly gone over alpha channels and the concept behind alpha lock, let’s have a look at how to use it in Procreate for the iPad. In simplest terms possible, Alpha Lock forces you to color inside of the lines. However, adding an alpha lock in Procreate (as demonstrated in the object to the right) will make it so that your brush strokes are confined to the circle and do not spill outside of it. This is something that would normally have to be corrected using selections and erasers. When An Alpha Lock Can Be UsefulĪ good example of when it can be useful to add an alpha lock in Procreate is when shading an object: Alpha locks, in short, force you to color within the lines by making it so that you cannot make edits to the transparent areas of a layer.Īs you can see in the diagram above, the object on the left does not have an alpha lock applied, meaning that when I tried to add shading to the circle, the shading spilled outside of the circle. It just makes it so you cannot add contents to the transparent areas of a layer. Or in other words, alpha lock doesn’t actually lock the alpha channel. ![]() ![]() Transformations made to a layer with Alpha Lock enabled will be applied only to the contents of that layer and not its surrounding areas. In Procreate, the Alpha Lock feature, when enabled, will make it so that you cannot edit the transparent areas of a layer. If the alpha channel represents opacity and transparency values, then alpha lock must mean that enabling it makes it so you cannot edit those values, right? Well, not exactly.
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