Hi! This issue came up in another thread and since I could reproduce it with a blank HDRP project I thought it deserved its own thread. When using a Decal Projector, if you tweak "Fade Factor" (for instance), most of the time the decal is duplicated and will be displayed indefinitely, until you enter play mode. It even remains if you switch scenes. On the screenshot below, I tested it with the example scene of an HDRP blank project: I added a Decal Projector, created a new Material using the HDRP/Decal shader, used one of the exemple's textures (Spotlight_Cookie) as Base Map and changed the color to green (for better visibility). Most of the time, slightly changing de Fade Factor of the Projector creates a duplicate decal. It's totally independent from the decal projector and is only affected if a change is made to the material itself. It's not bound to any game object. As someone said in the other thread, it looks like it's "baked" in the rendering pipeline. Entering play mode makes it disappear but it's very easy to reproduce. Given it's a blank project I assume it's a bug, but maybe I did something wrong somewhere.. :/ It was made in Unity 2019.3.0f6 + HDRP 7.1.8 Anyone care to try and reproduce it as well ? I came up with this issue in my own project, where I got many decal artefacts like this while turning decal projectors on and off (typically to display/hide the range of a cannon). In my case it's even different, the decal artefacts are snapped at position (0,0,0). Hope this gets sorted! Cheers.