Download Decal Master: HDRP Decal Placement Tool Free Unity. 

Decal Placement Tool provides you with an easy-to-use workflow for putting decals on all types of surfaces in your game world.

Features:
– Does not require colliders for decals placing (GPU Raycast)
– Easy to use
– Place decals on any surface by mouse click
– Burst placing
– Painting by mininimum distance placing
– Decal templates presets

Requirements:
– HDRP
– Compute shaders support
– Compute buffers support
– Command buffers support