Photomatch - Aligning a Rendering with the Original Image

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:

Photomatch - Aligning a Rendering with the Original Image

Post by Fletch » Mon Aug 31, 2009 1:39 am

To match a Photomatch render to the original image used for a photomatch.
If you project the image onto your model from the Photomatch tab, and they are not rendering as expected, try selecting "Texture>Make Unique" from the context menu for each face containing a projected photomatch image. This should not be necessary in most cases.
  1. open the original image used for the photomatch in SU "original" inside your photo editor of choice
  2. figure out exact Height in pixels of orig. image
  3. render your model with exact same resolution or greater by choosing the same height as original
  4. save the image "PMatchRender"
  5. select your entire model
  6. render alpha mask "PMatchMask" at TWICE the resolution of the PMatchRender image.
  7. in your photo editor resize the the PMatchRender image AND the PMatchMask if necessary to be exact same height resolution of "original"
  8. add an "alpha mask" channel to the "PMatchRender" layer
  9. now add the "PMatchRender" in a layer on top of the "original", now you should see them aligned perfectly
PhotomatchTut-HowBuildingLooksInSketchupWithBkgd.jpg
PhotomatchTut-HowBuildingLooksInSketchupWithBkgd.jpg (115.71 KiB) Viewed 8773 times
PhotomatchTut-HowBuildingLooksInSketchupWithOUTBkgd.jpg
PhotomatchTut-HowBuildingLooksInSketchupWithOUTBkgd.jpg (82 KiB) Viewed 9187 times
PhotomatchAlignedInPhotoshop.jpg
PhotomatchAlignedInPhotoshop.jpg (131.05 KiB) Viewed 10699 times

Fletch
Posts: 11711
Joined: Fri Mar 20, 2009 2:41 pm
OS: PC 64bit
SketchUp: 2016-2021
Contact:

Re: Photomatch - Aligning a Rendering with the Original Image

Post by Fletch » Tue Sep 01, 2009 2:12 pm

For a step-by-step using alpha masks in Photoshop, please try reading this one I put together a couple years ago.

Post Reply

Who is online

Users browsing this forum: No registered users and 4 guests