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Broken Diffuse Baking in 2.8
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Description

System Information
Operating system: Ubuntu 18.04
Graphics card: GTX 1080

Blender Version
Broken: 2.80 26d5a362ed
Worked: 2.79b

Baking in edit mode results in a crash, baking in Object mode yields a dark, glitched result

Details

Type
Bug

Event Timeline

Dalai Felinto (dfelinto) triaged this task as Incomplete priority.Sat, Dec 1, 3:36 PM
Dalai Felinto (dfelinto) claimed this task.

Unless the issue only shows if the file was created with 2.8x, could you please attach a file that can be opened in 2.7x?
(and you can upload files here instead of hosting elsewhere)

Huh, you're right, when I bake the diffuse in 2.8 using a file created in 2.7 it works.

If, in the 2.8 created file I change the shader on the High Poly from Principled BSDF to Diffuse BSDF the result is that consistently only half of the faces in the low poly box bake out.

Correction:
it worked for a single color, but when the color on the High Poly got varied (attached example) it is apparent that the bake result is patchy and broken and looks exactly like the effect with all other bake types, AO, normals, etc.
Regardless of if the file came from 2.7 or 2.8 - however there seems to be a small difference in the final effect based on that.

My first hypothesis as to what's happening is that the raycast length doesn't work and it's also grabbing faces from the other side of the object.

Dalai Felinto (dfelinto) raised the priority of this task from Incomplete to Normal.Sat, Dec 1, 6:00 PM

Thanks for the extra files