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Then we'll learn how to identify the different sources of noise a scene can have. Then we'll go over an example scene to demonstrate exactly how a render can be optimized to be faster and cleaner. We'll first cover some of the underlying concepts behind how ray tracing and V-Ray's sampling works.
But with a bit of understanding of how V-Ray works under the hood, you can achieve a higher quality result WITH faster render times - in some extreme cases ranging between 3x faster to 13x faster than the universal settings. There's often a lot of confusion surrounding V-Ray's sampling methods and what 'ideal' settings are. In other words, you create images that separate out information such as reflections, lighting, and shadows, which can then be used as separate layers in Photoshop.This tutorial attempts to cover the process of optimizing your V-Ray render settings to get the best possible render quality and fastest render time for a given scene. Here, you can set up extra channels to be generated along with the rgb color image. You can find spherical skies online and through Google image searches. Here, I often add a sky image so that it will be seen in the reflections of my model. For this daytime rendering, I left everything at the default settings. If you have a dusk shot, then you can tweak the sun color or use an HDRI image to generate the light. Therefore, changing the sun angle in Sketchup changes the sun angle here in V-Ray. Again, the default V-Ray settings are tied to the Sketchup sun. The GI Skylight box controls the sun specifically. This tab controls the overall lighting of the scene. This tab controls things like exposure of the rendering similar to how an SLR camera works.
If I have been experimenting with settings and things are getting weird with the outputs, I will often hit this button to start from scratch. This will take everything to the default V-Ray settings when the program was first installed. The V-Ray settings dialogue box uses tabs that expand and contract keeping the settings a little more manageable to navigate. This means the V-Ray interface is running inside of Sketchup.Ĭhanging the sun angle in Sketchup will change the sun angle in V-Ray. Before getting into the settings, there are a few more notes. Things like material setup, AO passes, dusk and interior shot setup will come later. To keep things manageable, this first post will be an overview of the basic concepts that I use for setting up a daytime rendering scene. Render settings are obviously a big topic to cover and there are many different rendering situations like interior shots, dusk shots, and daytime shots that require different setups. I am simply trying to get close to what I want and then refine the lighting and colors in Photoshop. Another very important point that I want to make is that I am not trying to produce the perfect V-Ray rendering each time. Right out of the box, V-Ray generates nice renderings. The most important of these were simplicity and flexibility.
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