This is a buggy OptiX issue I have been having on Blender even though I do have an RTX 2070 and have updated to the latest Nvidia drivers and even tested on various Blender versions. What happens when I switch Denoising on OptiX it keeps giving me Loading render kernels (may take a few minutes the first time) eventually it crashes. After spending hours figuring this out, my be way around it is not have the OptiX on but rather switch to OpenImageDenoise on Viewport setting when you load Blender or before you do any rendering.

1. Load Blender, before selecting Viewport Shading to Cycles, go to Render Properties [...]

When I started learning Blender, I struggle to understand why my playback was sluggishly slow. Couldn’t really find a quick solution without having to clicking here and there until I stubble across this switch. Doesn’t make sense in terms of the UI labelling. Anyhow hope this helps for anyone stuck.

1. At the bottom of the timeline, click on the Playback button.

2. Go to Audio, select No Sync and change this to Frame Dropping.(This will drop frame rates with complex scene for a more like real-time playback)3. Press the Play icon or Spacebar to play your animation. Your [...]

1. Go to File New > Video Editing

2. Go to the time line and press Shift A and select Image/Sequence.

3. Locate your render sequence images. Select the first rendered image and Ctrl Shift to select the last image and select Add Image Strip.

4. Play the timeline to check your imported animation using the timeline navigation at the bottom.

5. Select the Render Output and scroll down to Output. Assign file save location in the file field. Set up the file format and toggle the Encoding dropdown. Set the Container and Video Codec.The setting use in this tutorialEncoding (From Matroska): [...]

You have turned off your objects in the viewport however it is still showing up in the rendered image. This is not a bug or an issue, it’s because Blender 2.8 have separated viability options for the viewport and rendering. The rendering visibility is hidden on the default setup.

1. Open Filter panel from the Outliner and switch on the Rendering icon (Camera icon)

2. From Outliner, hide your objects by click on the Camera icon. Now the objects is hidden from your rendered image. (Note: switching off the viewport objects (eye icon) does not effect the rendering image)

3. Render > [...]