Scifi Lab with Nvidia Iray
The Sci-fi lab is a banner that I made to showcase the Nvidia Iray Renderer, MDL ( Material Definition Language) and Nvidia vMaterial catalog . The final result was compiled from LPE renders. LPEs stand for Light Path Expressions,which allow users to select exactly what items that they want to isolate from a scene by isolating rays of light. Light Path expressions are a lot like render passes except a lot more flexible because you can isolate very particular areas of your scene and you don't really need multi mattes as a result. One of the coolest functions of light path expressions is that they calculate all the light that hit or pass through an object meaning that they will also isolate the caustics, making liquid and glass color changes a breeze.
I modeled most items in the scene, textured, lit, rendered and composited it using Maya, Substance Designer, Iray and Photoshop.
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Final Composite of Scifi Lab
Grey pass of Scifi Lab : This is a gray pass showing off the models. The geometry was fairly simple. A lot of the details came from the materials used, and lighting.
Background elements rendered using LPE ( Light Path Expressions). LPES are flexible expressions that allow you to trace paths of light to targeted areas. This LPE rendered out any light that hit items tagged as "background".
Glass and the light it refracts isolated using LPEs. While this pass looks a little odd, the extrac light spill that is rendered out with the glass is essential, because it is easy to change the color of the glass and it's caustics.
Anly light that passes through liquid was also rendered out so that I could easily change the hue of the liquid and any of the areas that the caustics of the liquid affected,