Lemons!

[GhsT]

Hi Guys! I tried to make a photo-realistic lemon in blender the previous week, and this is the result:

[Old image, original in this post]http://dl.dropbox.com/u/9879940/LimoneLux.Scene.0000344.png

[Lastest render!, too large image for the thread]
http://dl.dropbox.com/u/9879940/Blender ... ene.v8.png


I'm a newbie in blender and luxrender, then the light (and other things) may not be good, i don't know

So, i need help to make this better. First, the material: i do not know if this so well or could be better. The textures are... good?... oh! The bump! The bump works well, but... I do not know much about the feature of microdisplacement of luxrender, not even whether it is compatible with the same kind of bump texture, and I could not get anything with it. I'm sure the best way to leave the very real lemon is with no bumpmapping, I think there are better methods, do not know. That's why I need your help to make this better and learn too .

The blend (update, is like the last image on this thread) http://dl.dropbox.com/u/9879940/Blender/LimoneLux.blend
The HDRI of the Hemi lamp (if the doubts)(thanks to ~zbyg from deviantart): http://dl.dropbox.com/u/9879940/Blender/studio019.hdr
and... the panel of luxrender (?): http://dl.dropbox.com/u/9879940/Blender/panel1.ini

Thanks so very much! Sorry for my primitive and very, very bad english! Used my little knowledge and google translator to try to say something hahahahahaha
All CC licenced, lemons can be used for anything and by someone (except commercial uses )

[Piita]

Well, the first thing that stands out it that they are very matte. Too matte. Try using a glossy material or turning the roughness way down. This would also show the bump map doing its thing a lot clearer. What you could do is use your favorite search engine to look for lemon images, and you will find a lot of reference images to try to replicate.

[GhsT]

Thanks man for the reply!

Well, i need tweak more the options, this is with glossy (fast config)



Looks better, but I feel that still lack. The only thing i hate is the time to see a good render (20 min for this image in a i5 2500K no OC, no GPU). I read that changing the type bidirectional render other things could change. As I recommend changing this section to get good results and a little more quickly?

And suggestions regarding the modeling of the lemon, texture and material, lights, etc, are still open Thanks so much!!

EDIT: 1 hour, 40 min of render more clean!



EDIT2: The bump is in reverse, looks rare , so i changed: (before: -0.02, now 0.02), and the renders looks good! waiting to finish, and more tweaks late. I'm a little busy now!

[zeealpal]

Nice, the second one looks alot better

You can use a bump map for micro displacement if you wish Its in the object data panel instead. Set subdivision scheme (lux's version) to Micro displacement, and set the amount of subdivision to 64 maybe? Make sure the displacement effect is not too large.

[SATtva]

I won't recommend microdisplacement for this case. We don't have normals smoothing support in MD at the moment, so lemons will acquire a faceted look.

[GhsT]

Great, so, for this case is recommended only bump?

Now:



looks good for me

[SATtva]

If you're going to use these lemons in a larger scene, i'd say they're already good enough. On the other hand, if you wish to render them close up in highres, you can use Lux's loop subdivision with displacement map -- this will require more RAM, but as there is nothing else in the scene it won't hurt.

[Meelis]

From this photo it's clear there is some subsurf scattering

[SATtva]

Yes, when you have a slice, and light enters the skin from the side. But when you have the whole fruit, the SSS effect is negligible, it can be simulated with glossy translucent material with slightest transmission.

[A-man]

Wow, those are nice!