Owlet lets you render just a part of the image by specifing its bounding rectangle. This is useful for distributed rendering when a single image is rendered on several computers and then merged together. Here’s how it works:
Owlet.exe --render --width=8000 --height=6000 --tile=1000,2000,1000,1000 --output=tile_1_2.png scene.owletScene
On MacOS it is almost the same:
Owlet.app/Contents/MacOS/Owlet --render --width=8000 --height=6000 --tile=1000,2000,1000,1000 --output=tile_1_2.png scene.owletScene
The –tile parameter tells Owlet to setup camera like it is going to render a 8000x6000 image, but actually render just a 1000x1000 piece of that image, located at 1000 pixels from the left and 2000 pixels from the top.
The format of –tile command is: –tile=left,top,width,height. You need to specify all four parameters separated by commas. The tile must not run out of the main rendering resolution, as otherwise Owlet will not be able to render it.
Resulting image will have the resolution specified in tile settings, not the main one, specified with –width and –height.