musickent Posted November 5, 2002 Share Posted November 5, 2002 How to make the effect of self-illumination, like the moon or a light bulb? In 3D MAX, there is an option for this in material editor. I don't know how to do it in Houdini. Thanks Quote Link to comment Share on other sites More sharing options...
mike Posted November 5, 2002 Share Posted November 5, 2002 turn on the "emit-value" or use a pic as "emit_texture" if you have a shader with this options, but I don't think this is possible whith the standard "Layered Surface" Quote Link to comment Share on other sites More sharing options...
sirogi Posted November 5, 2002 Share Posted November 5, 2002 in the provided shaders, whenever you see "constant shading" or "constant model" that's what it is...basically it renders your object disregarding the lighting info in the scene.... you could get it with the layered shader if you switch lighting model to "constant" and use the texture to tint the diffuse or you could get it (less efficient) with the super material if you set all your colors to 0 and "emit" to 1 then go to the texture tab and apply an emit texture as "add" or "image over" cheers.. Quote Link to comment Share on other sites More sharing options...
musickent Posted November 6, 2002 Author Share Posted November 6, 2002 Great...i got it Thanks, mates Quote Link to comment Share on other sites More sharing options...
musickent Posted November 8, 2002 Author Share Posted November 8, 2002 but . how to create the light around the moon or light bulb, because there should be some light emiting from them. Thanks in advance Quote Link to comment Share on other sites More sharing options...
MG Posted November 9, 2002 Share Posted November 9, 2002 Am I, really, hearing this correctly? Can you make things emit light in Houdini? I never even knew about that! Quote Link to comment Share on other sites More sharing options...
musickent Posted November 10, 2002 Author Share Posted November 10, 2002 i just want to know if it is possible to create this effect.. don't laugh at me... can i use the atmosphere object to do that, there is a option light halo there, i think it may be what i want, but i haven't got time to check it out. Quote Link to comment Share on other sites More sharing options...
sirogi Posted November 10, 2002 Share Posted November 10, 2002 adding atmosphere and fog seems the only way you could do that straight out of the renderer(the halo you see around bright objects is due to some atmosphere reflecting it...) or... compositing is great concept! most people do it that way Quote Link to comment Share on other sites More sharing options...
musickent Posted November 11, 2002 Author Share Posted November 11, 2002 thanks . But compositing only can create 2D effect, if the carema changes then the 2D halo need to be adjusted. Or..maybe i can render the bulb separately then comosite the halo with it. correct? Quote Link to comment Share on other sites More sharing options...
danteA Posted November 11, 2002 Share Posted November 11, 2002 The built-in compositor of Houdini can handle "deep rasters" which means you can render out 3D info from Mantra and then do 3D effects using the compositor. Quote Link to comment Share on other sites More sharing options...
sirogi Posted November 11, 2002 Share Posted November 11, 2002 Or..maybe i can render the bulb separately then comosite the halo with it. correct? yea, that's the general idea Quote Link to comment Share on other sites More sharing options...
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