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Composting (COPS)

  1. There are two kinds of compositing options in Houdini: global preferences and defaults which affect all compositing you do in Houdini, and project settings which affect a particular .hip file.

Channel Copy to Get the Other Passess

generator (has image tab) and filter nodes.

reduce shiness or in rendering in crease the roughnes..

in compositing, use the direct reflection pass then use subtract.

expand, dilate erode nod.e

Compositing Nodes

  • Merge
  • Composite (Uber Node. )
    • Like you can perform add, subtract etc
  • Layer
  • Dilate/Erode only on the Alpha Channel. After this you need a premult node.
  • Edge Blur Node before the Premult Node.
  • Fog Node

Channel Copy on separate R, G, B then do Radial Blur Do simulate the chromatic abberation

Denoise node in COPS itself.

Mask input on the node expects an alpha. But you can specify to search for color channel is alpha is not available. It's not like having black and white mask in a jpg file.

Render through File ROP Output

Cops lets you query info from sops via vex. The Sidefx Labs Maps Baker tool uses this by looking up uv's and querying sops normals, positions, other attributes, and bake them down into images in cops.

You can use cops directly with sops by just drag-n-dropping the cops node onto a texture path, and then prefix it with 'op:'.

F, P to frame data.