Alexander Weide Posted June 1, 2006 Share Posted June 1, 2006 ok i need help, i wanna create a dielectric material, with mantra. i wanna get a good alpha channel too. i need help, my shader is ready and only the transparency is not complete. i wanna get a fresnel transparency with spec'lights on the other side of the material..... i hope you understand what i want short: a realistic glassmaterial, with fresnel reflexions and realistic alpha channels. and i i think on maya..............i have to say, why is that so damm hard to recreate in houdini?????? the glassmaterial of houdini is unreal shit! Quote Link to comment Share on other sites More sharing options...
Jason Posted June 1, 2006 Share Posted June 1, 2006 a realistic glassmaterial, with fresnel reflexions and realistic alpha channels. If you look in the Bottles Lighting Challenge post, you'll find a hipfile with a functional glass shader. It's Mario's VOP network from the CornellBox thread. It's not wrapped up as a single node or as a SHOP, but you can get a lot from it. It doesn't support "absorbtion", however. the glassmaterial of houdini is unreal shit! [thinks] I'm sure there is a better way to phrase this. Cheers, Jason PS. A realistic alpha channel for glass is solid (1). There is no straight "passthrough" transparency because all the light passing though a refractive medium is remapped along another angle. Quote Link to comment Share on other sites More sharing options...
rjpieke Posted June 1, 2006 Share Posted June 1, 2006 ok i need help, i wanna create a dielectric material, with mantra. 28247[/snapback] I'd suggest starting with mental ray's dielectric shader, since the source is available freely. It should be very easy to port to Mantra (porting to PRMan went quite quickly) and can easily be extended to support glossy reflections/refractions (just be sure to only use glossy multi-sampling on the first bounce/transmission, otherwise you'll just get an insane explosion in the number of rays used). Cheers! Quote Link to comment Share on other sites More sharing options...
Alexander Weide Posted June 5, 2006 Author Share Posted June 5, 2006 sorry but are you crazy`?????? that classmaterial of Bottles Lighting Challenge post is unrealistic shit Quote Link to comment Share on other sites More sharing options...
Mario Marengo Posted June 5, 2006 Share Posted June 5, 2006 sorry but are you crazy`??????that classmaterial of Bottles Lighting Challenge post is unrealistic shit 28320[/snapback] huh? In an attempt to emulate your clear, concise writing style: "sorry but did you read what he wrote `??????" AFAICT, rjpieke didn't mention any posts anywhere... To get a clue, you may want to scan his post for the following words: "mental ray", "shader", "source ", "available freely", "port"...etc.But be warned that this may induce some unexpected firing of long unused neurons.And you get a prize if you find the words "Bottles Lighting Challenge" or "post".[edit]Oh, I see. You were referring to Jason's post.There is this wonderful mechanism available in the forum called a "quote". If you look at everyone else's posts in this thread you'll notice it being used. It allows the reader to know exactly what the heck you're talking about. I highly recommend using it.Regarding your glassy dilemma, I have the perfect solution:Write your own and post it in the new "Shaders" forum. This way we can all benefit from being exposed to a shader that is not "shit".... apologies to everyone else. It's been a long 2 weeks... and counting... Quote Link to comment Share on other sites More sharing options...
Marc Posted June 5, 2006 Share Posted June 5, 2006 I concur with Mario's sentiments. P.S. Perhaps you meant to say "Mario's glass shader is the shit, yo!" Quote Link to comment Share on other sites More sharing options...
stu Posted June 6, 2006 Share Posted June 6, 2006 Hey Mainframe123, I made you a glass shader, I hope you like it: glass_shader.zip Quote Link to comment Share on other sites More sharing options...
Overload Posted June 6, 2006 Share Posted June 6, 2006 HAHA...thats all I have to say.. Quote Link to comment Share on other sites More sharing options...
altbighead Posted June 6, 2006 Share Posted June 6, 2006 Hey Mainframe123, I made you a glass shader, I hope you like it: glass_shader.zip 28331[/snapback] wow.. that shit is hot.. please make more .. Quote Link to comment Share on other sites More sharing options...
TheUsualAlex Posted June 6, 2006 Share Posted June 6, 2006 Aaaaah. Houdini community is just awesome as always. Gotta love it. Quote Link to comment Share on other sites More sharing options...
sibarrick Posted June 6, 2006 Share Posted June 6, 2006 Hey Mainframe123, I made you a glass shader, I hope you like it: glass_shader.zip 28331[/snapback] Oh man that is so shit you can see the edge of the back wall. Total rubbish. You suck Quote Link to comment Share on other sites More sharing options...
Visual Cortex Lab Posted June 6, 2006 Share Posted June 6, 2006 oh damn ... now i wanna become a master doing such Shit STU !!! always impressed by your works and specially pleased by the fact you share it ... keep doing such shit please. cheers Quote Link to comment Share on other sites More sharing options...
peliosis Posted June 6, 2006 Share Posted June 6, 2006 Hey Stu this is so appropriate ! Could you say something more about the picture, it's a really glasslike piece of glass. Quote Link to comment Share on other sites More sharing options...
thekenny Posted June 6, 2006 Share Posted June 6, 2006 i got nothing. -k Quote Link to comment Share on other sites More sharing options...
Alexander Weide Posted June 6, 2006 Author Share Posted June 6, 2006 Apologize it look real realistic stu it looks amazing.... i have to learn more of youre work, of youre stuff and so on. that glass is what i want. thanks alot Quote Link to comment Share on other sites More sharing options...
Jason Posted June 6, 2006 Share Posted June 6, 2006 This is possibly the most intricate glass shader network I've ever had the pleasure of inspecting. Stu! How do you do it? (At least you got the Alpha right!) Quote Link to comment Share on other sites More sharing options...
michael Posted June 6, 2006 Share Posted June 6, 2006 I think it was the bottle of wine he had on Sunday Quote Link to comment Share on other sites More sharing options...
stu Posted June 7, 2006 Share Posted June 7, 2006 Yep, it's a pretty awesome shader alright - easily my best work. Here are some more renders: Quote Link to comment Share on other sites More sharing options...
symek Posted June 7, 2006 Share Posted June 7, 2006 Yep, it's a pretty awesome shader alright - easily my best work. 28389[/snapback] the hotdog has no tranculency in hears area!!! shame on you! It looks so artifical! almost like Mc`Donalds... you know, you should try harder.... Quote Link to comment Share on other sites More sharing options...
altbighead Posted June 7, 2006 Share Posted June 7, 2006 best thread ever on ODforce yet .. Hands down :nuke: Quote Link to comment Share on other sites More sharing options...
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