You can then gradually make your brush larger to make the color closer to the glowing object brighter.

Paint to reveal the glow color as desired. When using masks remember white reveals, black conceals By using a low flow we can add the glow in a very subtle manner.

Take your brush flow down to 1% or 2% then paint in white to reveal the glow color. Next, select a soft brush that's a little larger than the object we want to add the glow to. Make sure the mask is selected before inverting it, you can select the mask by clicking on it in the color fill layer of your layers panel. Next, invert the layer mask by hitting Ctrl+i (Cmd+i on Mac) on your keyboard with the mask selected. Once you have your solid color, change the blend mode to Linear Dodge (add) from the blend modes dropdown in the layers panel. Clicking on the duo-toned circle under the layers panel will bring up a list of Fill/Adjustment layers that you can add to your project. Here I've added an ellipse on a black background, then added a solid color using a deep red-orange for my primary glow color. Starting with the image you'd like to add a glow to, then insert a solid color, and choose a color to suit the object we're trying to add glow to. I like the straightforward and concise way this tutorial is delivered, although in trying to fit all the information into under 5 minutes, some steps might need to be expanded on for anyone new to Photoshop, I hope this article helps. In his video, Benny takes us through his super simple method of adding glow to an image in just five minutes.

Brush blend photoshop