Rendering With A LOT of lights (Best Practices Guide) in Rendering Posted June 3, 2019 On 4/24/2019 at 11:58 PM, Luis M Ruiz said: I am going to take a guess here. Are you using Image Effects on top of that viewport? (v2019) is that box checked when you hit update? On 4/24/2019 at 5:35 PM, frozenwaffles said: Hi, have you done a rebuild of your computer? What are you running? Mac or PC? if windows, what version? I'm not using image effects. Computer is new as of last spring, if I recall correctly. iMac 18,3 model iMac Retina 5K 27", 2017. . . 4.2 GHz Intel Core i7. . . 32 GB 2400 MHz DDR4 RAM. . . . Radeon Pro 580 8192 MB Graphics Card. . .