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Reference a cop node in a material

Notes :- You can look up any part of a cop network and reference it in your material using the op: command. For instance this could be as simple as using op:/obj/cop/texout  in the parameter for the map. Do remember you need the full path.

scene file :- rse_cops_toShop_material.hip

Linearize a image file

Notes :-  You often get a backplate from a client to make some feasibility study on doing an effect. So as we know that will likely be in srgb colour space so it has a gamma of 2.2 and of course every by default in Houdini is in linear space ! . To fix it so we can continue to keep in linear space you can add a gamma cop and set its value to 0.454545 or 1/2.2  This will in effect de-gamma your incoming file