Mark Elendt


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Houdini Rendering & De-noising

Recent Forum Posts

Adding Custom Metadata to Rendered EXR Oct. 7, 2020, 3:43 p.m.

Not sure exactly what version of Houdini this is supported in, but I don't think this fix was backported to H18.0.

From the upcoming documentation…

When saving an image, husk will process all the attributes on the render product. It looks for settings that begin with driver:parameters: and will pass that data down to the image as a piece of metadata. For example
    custom string driver:parameters:OpenEXR:test_string = "Hello world"          
custom float driver:parameters:OpenEXR:pi = 3.1415
will add metadata to OpenEXR files named “test_string” and “pi” with the types and values you might expect. Note that OpenEXR doesn't necessarily support all the types of data allowed in USD.

As a note, this should work with any render delegate (not just Karma).

Houdini 18 Karma Custom Fisheye Lens Shader Revisited Oct. 5, 2020, 8:40 a.m.

At 5:44 in the Houdini 18.5 Sneak Peak video they show a new physical lens shader for Karma.

UsdPreviewSurface use alpha of UsdUVTexture as opacity input July 7, 2020, 1:08 p.m.

This should be fixed in tomorrow's daily build of H18.

If you load up the attached .hip file you should see the surface become refractive where the opacity is zero. If you want a cut-out behaviour instead, you can increase the opacityThreshold to a very small amount (0.0001).