JonathanGranskg Posted June 3, 2014 Share Posted June 3, 2014 (edited) Hi, I'm having a ton of problem creating a realistic leaves for a personal project. Basically, what I'm having trouble with is getting good-looking translucency for my leaves. What I've tried: Custom shader with diffuse from both sides of leaves, Mantra surface with thin-film refraction (best results) and SpeedTree's shader. I haven't achieved anything I'm too happy with with any of these. So if you have any tips on how to deal with this, please fire away. Cheers, Jonathan References/Examples: http://images.fotocommunity.com/photos/nature/abstract-nature/sunshine-through-the-leaves-d4b9bf47-1098-46fc-9c4a-1a58022d81a8.jpg http://www.ronenbekerman.com/forums/attachments/landscape-vegetation/10295-realistic-foliage-test01.jpg http://www.ronenbekerman.com/forums/attachments/landscape-vegetation/10273d1346438773-realistic-foliage-img_1594.jpg Edited June 3, 2014 by JonathanGranskg Quote Link to comment Share on other sites More sharing options...
lukeiamyourfather Posted June 3, 2014 Share Posted June 3, 2014 Have you tried subsurface scattering? Quote Link to comment Share on other sites More sharing options...
JonathanGranskg Posted June 3, 2014 Author Share Posted June 3, 2014 (edited) Have you tried subsurface scattering? Yep, tried single scattering. Didn't notice any difference with it turned on or off, probably because the geometry is flat. Edited June 3, 2014 by JonathanGranskg Quote Link to comment Share on other sites More sharing options...
stevegh Posted June 3, 2014 Share Posted June 3, 2014 Have you tried the translucency option for refraction in the surface model? leafTransparency_sh_v01.hip Quote Link to comment Share on other sites More sharing options...
JonathanGranskg Posted June 4, 2014 Author Share Posted June 4, 2014 Have you tried the translucency option for refraction in the surface model? I tried playing around with it before, but your scene seems to get pretty good results so I'm going to try using refraction translucency again. Thanks for the help and the scene file. Quote Link to comment Share on other sites More sharing options...
lukeiamyourfather Posted June 4, 2014 Share Posted June 4, 2014 While not directly applicable since it's a tutorial for Arnold, it shows how the different passes contribute to the overall look. https://support.solidangle.com/download/attachments/5180878/rose.gif https://support.solidangle.com/display/mayatut/Shading+a+Rose A combination of translucency and subsurface scattering will help get you closer to photorealistic leaves. Good luck with the project! Quote Link to comment Share on other sites More sharing options...
JonathanGranskg Posted June 4, 2014 Author Share Posted June 4, 2014 While not directly applicable since it's a tutorial for Arnold, it shows how the different passes contribute to the overall look. https://support.solidangle.com/download/attachments/5180878/rose.gif https://support.solidangle.com/display/mayatut/Shading+a+Rose A combination of translucency and subsurface scattering will help get you closer to photorealistic leaves. Good luck with the project! Thanks! That looks interesting, I'm going see how it looks with a very thin extrusion on the leaves. I already have something I'm pretty happy with after using Stephen's tip. Quote Link to comment Share on other sites More sharing options...
altbighead Posted June 4, 2014 Share Posted June 4, 2014 I hope sidefx is taking notes of how to do a documentation properly. Arnold makes Mantra documentation looks like a little kid coloring book. Quote Link to comment Share on other sites More sharing options...
Guest tar Posted June 4, 2014 Share Posted June 4, 2014 I hope sidefx is taking notes of how to do a documentation properly. Arnold makes Mantra documentation looks like a little kid coloring book. Can't you write a better one yourself?. i.e. Jordi didn't wait for SideFx to write a SI to Houdini guide.... Quote Link to comment Share on other sites More sharing options...
altbighead Posted June 5, 2014 Share Posted June 5, 2014 Can't you write a better one yourself?. i.e. Jordi didn't wait for SideFx to write a SI to Houdini guide.... I am not sure if you are being serious or sarcastic but i will take it either way. If the developer can't even document properly and clearly of their own creation,nobody can. I have seen Mantra smoke Vray and Arnold on some of the heavy duty productions yet only a few people know how to take advantage of mantra. I know the Houdini documentation is getting better compare to 10 years ago but it's my interest to keep voicing to get better. 2 1 Quote Link to comment Share on other sites More sharing options...
Guest tar Posted June 5, 2014 Share Posted June 5, 2014 That's a very good point. Mantra could, and should be promoted as the F1 of renderers. Quote Link to comment Share on other sites More sharing options...
dulo Posted October 22, 2014 Share Posted October 22, 2014 Any progress on shading leafes ? Playing around myself, without much success ... 1 Quote Link to comment Share on other sites More sharing options...
vbk!!! Posted November 3, 2014 Share Posted November 3, 2014 did you try to use the pbrphase node ? Quote Link to comment Share on other sites More sharing options...
Mzigaib Posted May 29, 2016 Share Posted May 29, 2016 Hi, since I've found this topic to be the closest to what I was looking for I will continue from here. I am also having a translucency problem using refraction, considering that I am also using it for tree leafs and that my geometry is also flat but my problem is not with results but with render times I have thousands of trees on the field of view and if I turn refraction on the render times goes to the roof and I get more noise, I was wondering if someone have some tips about how to get a translucent leaf with a less costly render times using PBR. Thanks! Quote Link to comment Share on other sites More sharing options...
Guest tar Posted May 29, 2016 Share Posted May 29, 2016 The Physically based Diffuse can be set to Translucent. Worth a try. Quote Link to comment Share on other sites More sharing options...
Mzigaib Posted May 29, 2016 Share Posted May 29, 2016 Good to know, I'll try that. Thanks! Quote Link to comment Share on other sites More sharing options...
Mzigaib Posted May 29, 2016 Share Posted May 29, 2016 (edited) Dude, it hit the post! almost there, I just added a "PBR diffuse" with translucency inside the surface model and it worked but the problem now are the shadows I tried to use the "fake caustic" but it messes with the transparency, any tips on how to affect physically them or fake it without messing with the transparency? Edited May 29, 2016 by Mzigaib Quote Link to comment Share on other sites More sharing options...
Mzigaib Posted May 29, 2016 Share Posted May 29, 2016 (edited) Sorry for the redundant text in the end I am trying to edit my post but it wont let me. Edited May 29, 2016 by Mzigaib Quote Link to comment Share on other sites More sharing options...
Guest tar Posted May 29, 2016 Share Posted May 29, 2016 1 hour ago, Mzigaib said: Dude, it hit the post! almost there, I just added a "PBR diffuse" with translucency inside the surface model and it worked but the problem now are the shadows I tried to use the "fake caustic" but it messes with the transparency, any tips on how to affect physically them or fake it without messing with the transparency? I'm not seeing a shadow issue with a very simple setup - see attached. Quote Link to comment Share on other sites More sharing options...
Mzigaib Posted May 29, 2016 Share Posted May 29, 2016 What I meant by shadows is the ones casted by the object on others. Quote Link to comment Share on other sites More sharing options...
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