# tile_rendering#

-tile_rendering tile_count tile_index


Splits images into multiple tiles based on the input tile number and renders the specified tile number.

Sometimes you are not necessarily working on a sequence of frames and it can be very useful to distribute a single frame on multiple machines to speed up render times.

Argument Description
tile_count split the frame into the specified number of tiles
tile_index render the specified tile index

Note

Tile rendering deactivate kernel filters (such as Gaussian Blur or OptiX Denoiser) as they need the whole image to be processed.

## Examples#

Let's say we want to split our renders into 16 tiles and render the tile number 2. We would use the following command line:

cnode my_scene.project -tile_rendering 16 2


Now assuming the filename of the image to render is my_render, the rendered frame is 50 and the extension is set to EXR the resulting filename of the tile will be:

my_render.tilex16-02.0050.exr


Now if you checked Split Aovs In Separate Files in the Preferences Panel and you rendered diffuse and specular AOVs you will get:

my_render.tilex16-02.0050.exr
my_render_diffuse.tilex16-02.0050.exr
my_render_specular.tilex16-02.0050.exr


It's actually pretty simple. The tile identifier is always appended after the filename and before the extension.

For example, if you image name is my_render####, the rendered frame 50 and the extension EXR, the result will be:

my_render0050.tilex16-02.exr


Note

The tile_index is padded to the same length as tile_count. So if you have 500 tiles then tile_index is padded with 3 digits: 000

Let's say we would like to render the image below on 8 machines:

To do so you we need to specify on machine 1:

cnode bike.project -tile_rendering 8 1


On machine 2

cnode bike.project -tile_rendering 8 2


and so on until machine 8:

cnode bike.project -tile_rendering 8 8


We would then get 8 different renders which would form the final render when combined:

Warning

CNode only saves the tiles. To get your final reconstructed image you currently need to merge all tiles using a compositing package.