This section covers common parameters for all sampler types. For parameters that are specific to each sampler, see the following sampler sections below. Type – Specifies the image sampler type. Specific parameters for the selected type appear at the bottom of this rollout. Progressive – Progressively samples the entire image. See the Progressive Sampler for additional parameters. Bucket – Takes a variable number of samples per pixel depending on the difference in the intensity of the pixels. See the Bucket Sampler section for additional parameters. Min. Shading Rate – Controls the number of rays shot for AA versus rays for other effects like glossy reflections, GI, area shadows, etc. Higher values mean that less time is spent on AA and more effort is put in the sampling of shading effects. Render Mask – Enables the render mask feature. The render mask allows you to define which pixels of the image are calculated. The rest of the pixels are left intact. This feature works best with the V-Ray frame buffer and the Bucket image sampler. The following types are available: Disable – The render mask is not used. Texture – Uses a black & white texture to limit rendering to the white areas of the texture only. You can also use animated texture sequences by specifying an Image File VOP using the op: synthax (e.g. /mat/imageFile). Note that the Type of Image File VOP's UV must be set to Environment, and the Mapping Type to Screen. Object – Only the specified objects are rendered. Object ID – Only objects with the specified object IDs are rendered. You can list more than one object ID as a space-separated list. To add IDs to the Geometry nodes, add V-Ray Object Properties using the V-Ray menu. For more information, see the Render Mask example below. Clear Mask on Render Stat – Available when the Render Mask is enabled. When disabled, the masked region is overlaid on top of the previous image in the VFB. This can be used for draft renders or fast shader previews provided that the camera does not move. Note: When rendering an animation, the image clearing is forced on. Object IDs – Specifies a list of object IDs to be used for the render mask, when the Render mask is set to Object ID. AA Filter Type – Specifies the filter type to be used for anti-aliasing. V-Ray supplies eight types of Anti-aliasing filters: Box, Area, Triangle, Lanczos, Sinc, Catmull-Rom, Gaussian and Cook Variable. Each has advantages and disadvantages, which make them useful for different tasks. For more information, see the Anti-aliasing Filters example and the Anti-aliasing Filters and Moire Effects example below. Size – Determines the size of the filter in pixels. Higher values yield blurrier results. For more information, see the Anti-aliasing Filters example and the Anti-aliasing Filters and Moire Effects example below. |