How to use Alpha Mask render pass in Post Production

The Twilight Render Team shares tips, ideas, helpful hints, and more on using Twilight Render
Post Reply
Fletch
Posts: 11711
Joined: Fri Mar 20, 2009 2:41 pm
OS: PC 64bit
SketchUp: 2016-2021
Contact:

How to use Alpha Mask render pass in Post Production

Post by Fletch » Fri Aug 28, 2009 10:20 am

Start by reading this about placing a background image using Alpha Mask.
I will be creating a tutorial especially for Twilight, but for now there is one old tutorial I made that relate to this topic perfectly.
pg8 of the Twilight User Manual 'Advanced Settings' section wrote:
  1. Select an object.
  2. Choose “Alpha Mask” as your render method. (Camera Tab: Be sure exposure and gamma = 1.0)
  3. Start the rendering.
  4. When asked to render only selected objects choose “yes”.
  5. A black and white image will be created of the object.
  6. Save the rendered mask image.
a PDF version step-by-step what to do with the alpha mask once you have it

Post Reply

Who is online

Users browsing this forum: No registered users and 3 guests