brucelay Posted June 14, 2005 Share Posted June 14, 2005 Hi, I am doing a sea bed render with renderman in Houdini. I used an atmosphere shader "rman fog" in my scene. I am trying to add some light shafts by putting a few spotlight with volume smoke shader but the light shafts does not appear if I keep the "rman fog" on. The light shafts only visible when I turn the "rman fog" off. Why is that? Can someone pls suggest me a way of adding some light shafts on the sea bed without affecting the "rman fog"? I am pretty happy with the rendering speed. It only takes me 22sec to render the frame below with volume fog. (everything is done in Houdini) thank you for your attentions! Quote Link to comment Share on other sites More sharing options...
SvenP Posted June 14, 2005 Share Posted June 14, 2005 Ok i have no idea about rendering with renderman but i think to know that you can render curves with volume. Heres a quickly thrown together example how to get some "streak lines" to render as curves . The whole file is a mess and not working all that great but should give you an idea where to start . Svenstreakstest.rar Quote Link to comment Share on other sites More sharing options...
brucelay Posted June 15, 2005 Author Share Posted June 15, 2005 SvenP, Thank you so much! I have never thought of light beams could be achieved in this clever way! You widened my eyesight! I have no word to say except your scene is "FANTASTIC!" thanks! Ok i have no idea about rendering with renderman but i think to know that you can render curves with volume. Heres a quickly thrown together example how to get some "streak lines" to render as curves . The whole file is a mess and not working all that great but should give you an idea where to start .Svenstreakstest.rar 18780[/snapback] Quote Link to comment Share on other sites More sharing options...
Andz Posted June 15, 2005 Share Posted June 15, 2005 ... and I thought that I knew about .5% of what Houdini is able to do Maybe I should say, What Houdini let's you do Quote Link to comment Share on other sites More sharing options...
lisux Posted June 21, 2005 Share Posted June 21, 2005 Ok i have no idea about rendering with renderman but i think to know that you can render curves with volume. Heres a quickly thrown together example how to get some "streak lines" to render as curves . The whole file is a mess and not working all that great but should give you an idea where to start .Svenstreakstest.rar 18780[/snapback] Great SvenP! very clever. I have two questions about your technique. One is about the width attribute, this atribute is used by mantra to know the width of each point? I suppose this is the reason by which you are using it. The other question is how i can render curves, and how i can render curves with volume? Quote Link to comment Share on other sites More sharing options...
SvenP Posted June 21, 2005 Share Posted June 21, 2005 For a tutorial about curve rendering with mantra look here : http://www.sidefx.com/community/learn/rend...and%20Wires.pdf Sven Quote Link to comment Share on other sites More sharing options...
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