A Filter List is a list of COP nodes that let you quickly apply effects in your scene without having to set up an entire COP network. Edit and rearrange nodes directly in the Filter List window. Houdini applies the nodes in the order they're listed.

See Custom filters for information about how to create a custom filter.

1. Go to the Solaris viewport (/stage).

2. Set up a slap comp network in the Solaris viewport.

3. the Control Slap Comp settings button and choose New Filter List. This opens the Filter List window.

4. Click Add Filter and choose from the list of nodes to apply them to your scene. You can set and reorder these nodes directly in the Filter List window.

   You can now the Control Slap Comp settings button and choose Edit Current Filter List to further configure the Filter List.

1. Go to the Solaris viewport (/stage).

2. Create an Image Filter LOP. This lets you author a filter list on the stage. See The Image Filter LOP for more information about the Image Filter LOP.

3. Click Add Filter in the parameter editor and choose from the list of nodes to apply them to your scene. You can set and reorder these nodes directly in the Image Filter LOP.

4. Add a Karma Render Settings LOP and wire the Image Filter LOP into its first input.

5. Go to the Karma Render Settings LOP’s Image Output ▸ Filters tab.

6. Choose the filter list primitives for rendering from the Filter Prim dropdown menu. You can add multiple image filters, and they apply in the specified order.

   Tip

   To quickly add image filters, you can instead click the button beside a Filter Prim to automatically create and attach an Image Filter LOP.

   Note

   For third-party renderers, the Image Filter LOP works only in husk. You can add the husk:orderedImageFilters property (in the HuskRenderProductAPI) to the Render Settings primitive.

   You can now use standard USD editing tools to manipulate the image filters.

1. Go to the Solaris viewport (/stage).

2. the Control Slap Comp settings button and choose New Filter List. This opens the Filter List window.

3. Click Add Filter and choose from the list of nodes to apply them to your scene. You can set and reorder these nodes directly in the Filter List window.

   Note

   These changes won’t apply to your scene until you reference it in a USD Render ROP LOP.

4. Create a USD Render ROP LOP.

5. Go to Husk ▸ Slap Comp.

6. Add a Slap Comp and set its Source to COP Filter List.

7. Set COP Filter List to the location of your COP Image Filter List node (for example, /img/copnet_filterlist1).

   Karma now applies the Filter List. the Control Slap Comp settings button and choose Edit Current Filter List to further configure the Filter List.

The COP Image Filter List node is automatically created when you choose New Filter List from the Control Slap Comp settings menu. See COP Image Filter List for information about this node.