SOLVED I downloaded the sample shaders that come with HDRP, which I wasn't aware existed. To download them, click on HDRP in the list on the left side in Window > Package Manager and, on the right, download the sample shaders. Hello, My particle effects are no longer visible. I'm unsure when, exactly, this happened. I recently converted my project to HDRP but I'm almost positive that it worked for a while after doing this, though I can't be 100% certain. The particle system is instantiated where it should have been: Here are the settings: And the material: What could be causing this? Is it the shader? This guy here says the shader works in HDRP https://answers.unity.com/questions/1745971/using-shuriken-particles-with-hdrp-on.html and it's the one I used before HDRP Thanks a lot!