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Overview

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In this section you can control a variety of V-Ray parameters related to the overall operation of the renderer.

 

UI Path: ||Render Settings window|| > Settings tab > System rollout

 

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Raycaster Parameters

 

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One of the basic operations that V-Ray must perform is raycasting, the process of determining if a given ray intersects any geometry in the scene, and if so, identifying that geometry. From a technical perspective, the simplest way to implement raycasting would be to test the ray against every single renderable triangular face in the scene. Obviously, in scenes with thousands or millions of triangles, this would be very slow. To speed this process, V-Ray organizes the scene geometry into a special data structure called a binary space partitioning (BSP) tree.

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Tiled Texture Parameters

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Tiled texture cache size – Specifies the size, in megabytes (MB), of the texture cache to be used for tiled OpenEXR and tiled TIFF files. This parameter has a similar function to the VRAY_TEXTURE_CACHE environment variable and is not applied, if it has a lower value than it.

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Advanced System Parameters

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Max render threads – Determines how many threads will be used by V-Ray for rendering. When this value is set to 0, V-Ray will use all the CPU cores available on the machine. 

Low thread priority – When enabled, the rendering process will have a lower thread priority to allow other processes to run faster.

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Memory Tracking

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Enable memory tracking – Enables – Enables tracking of how much memory is used by V-Ray for different categories of objects like textures, geometry, GI, image sampling, etc. Enabling this option generates .html reports with detailed information on memory usage.

Output directory – Specifies the location to save the memory reports. The default location is the user temp directory.

Show last report – Opens the last saved report in a browser.

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V-Ray Profiler

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V-Ray Profiler is currently not supported on V-Ray GPU.

Profiler mode – Determines the mode in which V-Ray Profiler works.

Off - V-Ray Profiler is disabled.
Simple - Reports the time spent on rendering different calculations per each shader such as GI, Reflection, Refraction etc. Suitable for most scenes. It requires resources to run and may slow down your rendering by up to 4%.
Full - Provides an in-depth report. It includes detailed information such as time of calculation per shader. For example, it shows time spent calculating the reflection of a shader, as well as what shaders are reflected in it and how long it took sampling them. This mode is suitable for scenes that include views through glass window or in a mirror reflection. It can slow down the render by up to 20%.

Output file – Specifies the location and name of the .json file.

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Post Effects Rate

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Post effects rate – The regularity of updates during progressive rendering; roughly the percentage of the time effects like denoising and/or lens effects are allowed to take compared to the frame render time. Zero disables updates during progressive rendering, while larger values cause the effects to be updated more frequently; 100 causes updates as often as possible. Values ranging from 5 to 10 are usually sufficient. For IPR, the value is internally set to 100, unless the value was manually set lower than 10.

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