CG Sketchbook , notes and tutorials

more about the “blame!” styled environment

Here is the latest wip picture . (note:  it’s a quick wip-render:  1h on my q6600 will need double resolution and i guess 4-6h rendertime)

Quite a bit of nodes work , as usual. You can see the effect discussed in previous post , but extended : i used a vignetting image to  add a pink-grey fog around corners of image ; But only for midground (using zdepth). Well, if you focus on it doesn’t improve the look of that area  ..but does help readability of the whole picture.

Now .. The original image rendered this summer with Luxrender 0.6: about 30 hours of render (some of the time  net rendering on  2x q6600 pcs) here it is :

lots of nodes here too , even some ao pass overlay (from BI)  and tonemap in qtpfsgui.

Muuch more love and attention was put into this version respect to new vray renders .. and it shows(but -i must say- with vray i could re-setup all materials quite fast and easily)

The lux version uses mostly mesh emitters , carefully tweaked thanks to the real time lightgroups preview. (allows to turn off  some lights and adjust relative intensities while rendering. Very useful !!)

So, btw, can’t make easy side-by side comparison between the 2 engines here. too many variables.

This 30-hours render shows clearly  some nice subtleties of shading :  Most  materials are quasi-diffuse but have glossy reflection .. there you can appreciate the physical based nature and the brute amount of samples , also note the safeguard character ..that’s ‘just’ translucency but looks good as SSS effect for it.

On the other side ..overall , i had the feeling that the physically accurate philosophy of Lux  wasn’t working very well for this project :  i’ll never have an accurate 1:1 reproduction of this environment to “simulate” !,After all this will always be more of an illustration .. so all the bias of vray actually helps to define the style of this illustration , while all the accuracy of Lux tends to give it the look of a scale model…

So despite the vray wip picture in this post isn’t refined as the Lux one ..i still find easier to “direct”  vray to the result i want .. i guess that’s another definition of  ‘bias’ ?

(by the way , of course Vray is a much more developed software .. i know . indeed mine is a comparison of philosophies not of features , And i don’t mean to say Lux should change anything about his philosophy , on the contrary : it’s absolutely important to have an open source, physically accurate render engine core ..later on the artist’s tools and speed tricks can be improved , imho makes sense to have a very strong , accurate and modern core engine before .. Rendering is still evolving a lot so it’s good to have Lux focused on new technology rather than artist needs ..even if -by now- it means using vray for me ..i guess it will pay in the future.


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