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Found 3 results

  1. Hi everyone. First post here and new houdini user, so be gentle! I'm trying to understand how one might go about adjusting an HDR within Houdini rather than adjust in another DCC and reload in Houdini. I tried loading the HDR in to /img/ then adjusting with a color-correct before loading in to the mantra environment light using an "op:" path, but this introduced a painful delay as houdini seems to "cook" all too often even when as far as I would assume, the HDR doesn't need colour corrected until render-time, and even then, only on a per-pixel basis during render. So, I assume I am approaching this from a totally non-houdini way of thinking. The options as I see them are 1) Adjust the HDR in a different application. 2) Adjust the HDR in the environment light by adjusting the color tint values. 3) Adjust the HDR in the /img/ context and save out with a ROP when satisfied with the result and then pass the direct path to this saved file to the environment light (rather than pathing to the file-in node within \img). 4) Access the file-in node within the environment-light and add a color-correction in there (although when I open the environment light node network, there is no sign of the file-in as one would expect or as you can find in a standard mantra shader node network). So, I guess my question is, where I have a 'map' in houdini, what is the best way to colour correct the map either by processing outside the object or inside the object node network? (where 'object' could mean primitive/light/shader/etc). Thanks
  2. Latlong lens

    Let me start by saying that I am not a smart man... (and thus shouldn't be using Houdini for a living but hey, here I am). I'm trying to render a latlong image from camera for re-use as an HDR -what beyond setting the projection to panoramic is required? Is there any relationship to focal length or is it ignored with a polar render?
  3. Hi, I just created a simple Lighting and rendering tutorial for Houdini. It's primarily for people who are moving over to houdini from another 3d software and want to get a general understanding of the lighting and rendering workflow. It covers basic topics such as Area lights , Environment lights, HDR , Mantra PBR settings and modifying HDRs using COPs. I also have a few other tutorials on my vimeo page that you can also go through if you are interested. Tutorial regards Rohan Dalvi
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