Vases

A selection of glass vases, in a magazine style shot.
Modelled in Blender 2.68a, render in Cycles with 700 samples at 800 x 1280, post processing internally.

<img src="/uploads/default/original/3X/7/9/79aedb9084d643d59361b6a1c04b94a6825c117c.jpg" width="312" height="500"><br/>

As ever, click through twice and zoom to see in original resolution.

I’d be interested in everyone’s comments and critique.

Why one of them flies?

@Lesiu: It doesn’t, it’s the bottom part which is smaller. On a first look it might look like it’s hovering over the ground.

I like it, looks pretty realistic. I’d really love to know how the color of the far left one is done.

@Achatos:

Thanks, I was going for a realistic look. The vase on the far left has this material noodle:



It is a slightly superficially modified version of a noodle I first encountered from Gottfried Hofmann.

The upper colour in the mix node is the glass base colour, the lower colour is the absorption colour. The first multiplication is simply to inverse the sign (and can be deleted if you also reverse the following value), the fourth noodle is the absorption coefficient. The third multiply value is the one to tweak (set at 50 in my image). This number can be thought of a the depth of the glass. A setting of zero will colour the glass the base colour only, and increasing this value will colour the glass past a minimum ray depth. Increase this a lot and you will only use the second colour. The trick is to adjust it to the thickness of your model and the effect you are going for.
This noodle is a very basic one, as it can also be used on the ior or roughness values as well, there are many translucent/transparent etc. materials you can create by variety. The great thing about it is that you can colour the glass entirely and still have uncoloured reflections, as real glass, which is not how the glass bsdf works.

Check out this link for a full explanation from the original composer of this noodle, I presume. http://www.blenderdiplom.com/en/tutorials/all-tutorials/419-tutorial-absorption-in-cycles.html
Its a very informative video, thanks to Gottfried Hofmann.

Recently moved to this Focused Critique forum from the Finished Projects forum (thanks moderators).
I would really appreciate any critique on this project, as I am looking to improve this work and my technique in general. In this image I was going for photorealism, and used several techniques that I hadn’t previously employed, so all comments gratefully received.
Thanks.

I think this is soo good. Maybe the green and blue looks to have a bit thin glass at the top, to be this big vases. And the little orange is not as photoreal I think. But well done zzero101 and great tut by Gottfried.

Thanks ola. Do you mean that both the blue and green vases are too thin at the very top - the rim? I’ve been unsure about the small orange one, what aspects of it do you think are letting it down?

  1. Yes, it looks like 1mm, its too small, I think.
  2. The orange shall stay :wink: but its something with the gloss. Isnt this that kind that are glossy at the surface and less, like now, in the surface crevices/folds?

I would recommend applying some curves to your render to darken the darks, brighten the brights and boost contrast. There’s a bit of grayness about the midtones.