Sparkle Shader

For Holiday Hideaway in Walkabout Mini Golf, I wanted to add something special to the ribbons on the presents around the level. I added a sparkle effect that would change as the player moved around the scene. I achieved this by taking a triplanar sample of a noise texture and doing a dot product against the view direction, and then converting that back to world space. I added that to the reflection to create the sparkle effect. I found that I could use the same effect in the snow shader by pumping it into the color output to create bright white sparkles in the snow.