--- title: "Corona VFB (legacy)" canonical: "https://documentation.chaos.com/space/CRMAX/124759200/Corona%20VFB%20(legacy)" format: markdown --- This page provides information on the Corona VFB, its settings, and usage. ## **Overview** --- ## **Corona VFB Buttons** --- | **Button** | **Description** | | --- | --- | | ![image](media://b4b56578-1e1d-486f-b628-4dcd6d558269) | Saves the render element currently displayed in the VFB using a specified file format. | | ![image](media://4c7933e5-9ae2-4e62-b2ac-a5857c2e3608) | Press and hold the "**Save**" button:
**Save all** – Saves each render element as a separate file using a specified file format.
**Save CXR **–** **Stores all the information from the VFB (all render elements, including the LightMix, tone mapping, denoising data, etc.) inside a single CXR file. | | ![image](media://f73fd4e2-23bb-4569-b42d-5ff74cab5fd2) | Copies the content of the Corona VFB to the native 3ds Max VFB. | | ![image](media://ea51fcd6-7e00-4858-a474-0d4d361c7e5c) | Copies the render element currently displayed in the VFB to the clipboard.
Useful for pasting the content of the VFB into other apps without saving the file. | | ![image](media://57723542-2ece-43ea-8e9b-c04620b309f2) | Forces a VFB refresh. Useful mostly when using very high [VFB update interval](https://docs-chaos.atlassian.net/wiki/spaces/CRMAX/pages/125309932) values. | | ![image](media://447844b9-3f8e-4956-918b-1f9c263f6ec5) | Clears the VFB. | | ![image](media://781f5248-d446-48e3-b65a-bc78e244e8b1) | Toggles visibility of the side panel. | | ![image](media://7a427323-10a1-46f8-bec5-de9792f81e7c) | Toggles render region drawing mode.
Left-click and hold to draw a region. Drag region border with Control key to enable "fuzzy regions".
Holding the mouse over the Region button toggles all regions on and off (**Disable All**), and remove all (**Remove All**) existing regions. | | ![image](media://1946a56c-8dcb-48f7-82fc-c4fa79ff20f4) | Allows to pick object from VFB.
Left-click to select an object. Right-click to select and object or set camera focus to the selected point in scene. Works also in interactive rendering. | | ![image](media://33aa23a3-5066-4673-bcc9-092664b77e76) | Selects the render element to be displayed in the VFB. | | ![image](media://45963f81-597e-4927-969a-24d49cbcc8bf) | Zooms in. | | ![image](media://005a245d-6962-477d-ada9-0d33ccaf58da) | Zooms out. | | ![image](media://036c0870-035f-4624-9563-c0c1f834449c) | Resets zoom. | | ![image](media://3d645101-1fc9-4caf-b1f2-899685f747a7) | Stops the rendering process without discarding any additional data or post-rendering actions.
This is the same as the "**Stop**" button in the 3ds Max rendering dialog - when [denoising](https://docs-chaos.atlassian.net/wiki/spaces/CRMAX/pages/124527460) is enabled, pressing this button stops the rendering process and proceeds to denoising.
However, **Cancel** button stops render and discard denoising or post-rendering actions as well as skips saving output files (if were set up). | | ![image](media://20d7c08f-a44e-4f50-adf5-e48efff0d91f) | Press and hold "**Render**" button**:**
**Render** – Starts render.
**Start IR **–** **Starts [Interactive Rendering](https://docs-chaos.atlassian.net/wiki/spaces/CRMAX/pages/125309285).
**Resume last **– Resumes last render.
**Resume file** – Resumes rendering based on a previously saved CXR file. | ## **Post Tab** --- ## **Stats Tab** --- ## **History Tab** --- ## **DR Tab** --- ## **LightMix** --- After at least one Lightselect and one LightMix render element are added to the scene - the interactive LightMix tab will be enabled.  Check [Corona LightMix](https://docs-chaos.atlassian.net/wiki/spaces/CRMAX/pages/124625913) for more information.