---
title: "Rendering Specific Objects with Render Mask"
canonical: "https://documentation.chaos.com/space/VMAX/113575497/Rendering%20Specific%20Objects%20with%20Render%20Mask"
format: markdown
---
This page provides a tutorial on using V-Ray's Render Mask feature. Overview The Render Mask makes it easy to choose just a part of the image you'd like to re-render. It's more accurate and offers more control than Render Region. It can be found in the  Image Sampler (Antialiasing)  rollout. Want to follow along but don’t have a license? Workflow Here's our base render: In the next steps, we render just a few different objects and not the whole scene again. Let's color the chrome material and match the eyes and neck frames to the robot's yellow joints. Next, select the objects to re-render: all the chrome parts, the eyes and neck frames.  Then we go to the  V-Ray  tab >  Image sampler (Antialiasing)  rollout and choose the dropdown for  Render mask . From the dropdown we have several choices: Texture  – Uses a black and white image to control the rendered areas. Selected  – Renders only the currently selected objects.   Include/Exclude list  – Renders only the objects added to the list.   Layers  – Renders only the objects from the selected layers. In our case, we choose  Selected . Render the scene, and you'll notice only the selected objects are re-rendered. The rest of the image remains unchanged. To make it a bit more noticeable, clear the VFB by selecting  Clear Image  from the VFB toolbar. In the  VFB Confirm  dialog that appears, choose  Yes  to confirm. Now that we've cleared the VFB, we render again. This time it's easier to see that only the selected objects were re-rendered.  If we look at the Alpha Channel, it is updated as well. Notes When rendering animation with Render Mask, the previous render can be cleared by going to the  Render Setup  window >  Settings  >  System  rollout and setting the  Previous  parameter to  Clear . When using VRayPhysicalCamera and Auto Exposure enabled, note the following: after the initial render is done, use the  Transfer to camera  button from the Render Setup. Then disable the Auto Exposure. This way, the exposure is constant regardless of the region or object selection.