The Displacement Bake is creating a mid grey background upon baking even though the starting image is black/alpha. It make…

This topic has 8 replies, 4 voices, and was last updated 8 years, 7 months ago by David Frazier.

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July 6, 2017 at 3:22 pm #4633
Joseph Cotter
Participant
The Displacement Bake is creating a mid grey background upon baking even though the starting image is black/alpha. It makes creating a mask from the displacement image create pretty much impossible. Is this a change in Blender or am I doing something wrong.
July 6, 2017 at 3:24 pm #22882
Joseph Cotter
Participant
Hmm, upon rebaking I got an actual alpha this time so evidently was doing something that corrected itself.
January 19, 2018 at 6:12 pm #22883
Cortnie Johnson
Participant
Having this same issue, but I rebaked and same thing…. see attached image. Help!
January 19, 2018 at 6:20 pm #22884
Cortnie Johnson
Participant
Nevermind, false alarm. Figured it out. If you are having this issue just go back and do the whole thing again, I used a second new image.
February 3, 2018 at 11:40 am #22885
David Frazier
Participant
I’m having the same issue! But re-baking multiple times has not solved anything. This looks to be a possible bug with 2.79. 🙁
February 5, 2018 at 12:29 pm #22886
David Frazier
Participant
Hey guys, you don’t need worry about if you’re having the alpha-less grey background on your Bake-DISP maps. Because you will ultimately be creating a mask for it in Photoshop anyway. Plus, as Kent has commented, “No alpha means smaller file size, which is good.” Just go ahead and proceed with your grey map and you will be perfectly fine. Cheers, and happy Blending everyone!
February 6, 2018 at 9:11 am #22887
Kent Trammell
Participant
Thanks for passing this along, David! Helping your fellow members out 🤘
February 6, 2018 at 11:00 am #22888
David Frazier
Participant
I take back my last comment. The gray background is indeed a problem that needs a proper solution. Because in the Painting the Skin video to come, Kent bakes the hands and head, where the head will be solid gray. So since the background is also the same color gray, the head is 100% un-seeable, therefore prohibiting Photoshop from being able to make a proper mask. (There has to be something visible in order for PS to make a mask for it.
February 6, 2018 at 11:13 am #22889
David Frazier
Participant
Hey bro, I’m glad to, really, it’s my pleasure. However — unfortunately — my help was wrong. The gray background problem does matter. In fact, it matters so much that the all progress is virtually halted in this course because of it. I say “virtually” because we can use your DISP maps that you provided in the source files. But without those, the student is unable to re-reproduce your workflow because of the gray b/g problem. If the head is gray with zero information, and the background is also gray, then there is nothing visible for PS to make a mask with. Hope this makes sense. A Google search will turn up quite a few thread-links discussing this same problem, all of which still have no solution (I scoured blender.org, blendernation, blenderartists.org, stackexchange, and several others, reading through the entire thread of each).
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