3.2.2 Target Passes

A target pass is the action of rendering to a given target, either a render texture or the final output. You can update the same render texture multiple times by adding more than one target pass to your compositor script - this is very useful for 'ping pong' renders between a couple of render textures to perform complex convolutions that cannot be done in a single render, such as blurring.

There are two types of target pass, the sort that updates a render texture:

Format: target <Name> { }

... and the sort that defines the final output render:

Format: target_output { }

The contents of both are identical, the only real difference is that you can only have a single target_output entry, whilst you can have many target entries. Here are the attributes you can use in a 'target' or 'target_output' section of a .compositor script:

• input
• only_initial
• visibility_mask
• lod_bias
• material_scheme
• pass

Attribute Descriptions

input

none

The target will have nothing as input, all the contents of the target must be generated using its own passes. Note this does not mean the target will be empty, just no data will be pulled in. For it to truly be blank you'd need a 'clear' pass within this target.

previous

The target will pull in the previous contents of the viewport. This will be either the original scene if this is the first compositor in the chain, or it will be the output from the previous compositor in the chain if the viewport has multiple compositors enabled.

only_initial

visibility_mask

lod_bias

material_scheme