Ryzen 7 3800x
31.9 GB Ram
Operating system: Windows 10
Graphics card: Nvidia 2060 6GB Ram
I tested the same scene out on my other box and the problem happened. Both machines are running RTX 2060s. One is a Intel box and the other AMD.
Blender Version 2.81 and 2.82a
Worked: Nothing has worked
YouTube link to render glitches: https://youtu.be/e1ScHjBANLk
Whenever I start a render, around frame 58 the sun shadows just disappear.
If I close the scene and open it back up and render the frame where the shadows disappear, it will render fine. But after about 50 or so frames the shadows disappear again.
It works fine in viewport.
I deleted the volume light box with just a 1000 floating sprite boxes for the dust inside the garage. After that, the issue went away all together. I then added the volume box back and the problem happened again. It must have something to do with volume lighting. The grass outside is over 12k clones using a particle hair so it has something to do with volume lighting and particles inside a object.
It was 12 GB, removed extra elements and brought it down to this.
Around frame 60 if you render the animation 1-300 the shadow will disappear. Escape the render… The viewport will continue to display the shadow. But after the shadow disappears during the render, and without closing and reopening Blender, whenever you render that frame, the shadow “sun light” is absent.