hole in bake normal
Closed, ResolvedPublic

Description

System Information
windows 10
graphics card : NVDIA GeForce GT 610/PCIe/SSE2

Blender Version
Broken: (blender 2.79 rc2)

Short description of error
hole in bake normal


Exact steps for others to reproduce the error

  1. open my files
  2. press bake
  3. you will see hole transparent in image

Was this working with old Blenders? (e.g., 2.78)? Are you using Cycles or BI?

Dalai Felinto (dfelinto) triaged this task as "Incomplete" priority.Fri, Sep 8, 10:37 AM

Also please simplify the file. You should be able to isolate the problem to a few polygons only.

this file test use 2.78 , 2.79rc2 result hole.
use cycles

Are you sure? I tried here with 2.78a and:

  • You are using a principled node, which hasn't been in any official Blender
  • In 2.78a I see the hole

The other thing that would be helpful is to see if you have this issue with Blender Internal too.

my original file is 2.79rc2
for testing i use 2.78c then i use diffuse bsdf

i didnt see problem with blender internal.
its problem appear when use cycles.

@Dalai Felinto (dfelinto): i try test again this file.. i try edit unwrap this model then bake normal, result hole disappear..
problem solved.
i dont know its bug or not .. but change unwrap on model solve this hole

Brecht Van Lommel (brecht) raised the priority of this task from "Incomplete" to "Confirmed".Fri, Sep 8, 3:41 PM

I can confirm the issue, looks like a bug to me.

Sure it is a bug, but I was hoping to spare developers' time for tasks that the reporter could do, such as simplifying the file.

@Dalai Felinto (dfelinto)
not sure if it helps now but i simplified the file isolating the the problematic face.

ill test a few things on a 6859695 and RC2 , all test was done resetting blender and doing a bake before to test that if its failing when i open the file:
-rotate the uv 3º to 8º and the problem solves --> rotate back - 3º to 8º to return the uvs to the same place and the problem still solved
-move among 5 to 12 pixels any uv vertex in a single axis and its solves, it was kind of random on this too, try this one like seven times and a few where where fixed on different values, return to position and the problem still solved
-add one more subdivision and it solves.
-Baking Object instead of tangent normals, doesn't show the error.
-BI also works OK

I could however, move or rotate the uvs to "fix" the issue, but if i return the uvs to its original location using Ctrl+Z the problem returns.