Emission baking seems to be broken in recent Blender 2.8 Beta #60615

New Issue

Lewis Toohey · 2019-01-18T10:01:56+01:00

Lewis Toohey commented

2019-01-18 10:01:56 +01:00

System Information
Operating system: Ubuntu 18.10
Graphics card: Computer 1: Nvidia GeForce GTX Titan X and Computer 2: Intel Ultra HD 720 (two computers)

Blender Version
Broken: Blender 2.8 2757469824
Worked: (optional): Beta from approximately 11 January 2018

Short description of error
Baking gives incorrect results in the most recent beta of Blender 2.8 for some materials (e.g. a completely Black bake on all faces, or garbled results). Removing materials sometimes fixes this.

This is either a bug, or the "rules" for baking have changed in a way that is not obvious.

Exact steps for others to reproduce the error
Unfortunately it is just a hard problem to describe, and my results seem to be inconsistent. I have done my best to provide an example .blend.

Open the attached .blend file. Take note of:

The While illuminated windows displayed on the object (created by a mix of emission and Principled BSDF);
Only one texture, with a selected image node set to "Test512" for baking;
The UV map is ""UVMap" is active for rendering, but the UV map "Whole" is also specified in the shader editor for some elements of the material;

Switch the active UV map to "SimpleBake" (this third UV map is a unwrap of the entire model) , then Bake emission.

system-info.txt

Problem.blend

In previous betas this would achieve the expected result (i.e. it would bake the white emission windows - using the UVmap active for rendering, and the one one manually specified in the shader editor.

In the newer betas this results in a totally Black bake (for me, anyway).

Given how this used to work fine and now doesn't, and at one point I had two computers with older and newer betas that gave different results, I believe this to be a bug that has crept in in the recent betas

**System Information** Operating system: Ubuntu 18.10 Graphics card: Computer 1: Nvidia GeForce GTX Titan X and Computer 2: Intel Ultra HD 720 (two computers) **Blender Version** Broken: Blender 2.8 2757469824bb Worked: (optional): Beta from approximately 11 January 2018 **Short description of error** Baking gives incorrect results in the most recent beta of Blender 2.8 for some materials (e.g. a completely Black bake on all faces, or garbled results). Removing materials sometimes fixes this. This is either a bug, or the "rules" for baking have changed in a way that is not obvious. **Exact steps for others to reproduce the error** Unfortunately it is just a hard problem to describe, and my results seem to be inconsistent. I have done my best to provide an example .blend. Open the attached .blend file. Take note of: - The While illuminated windows displayed on the object (created by a mix of emission and Principled BSDF); - Only one texture, with a selected image node set to "Test512" for baking; - The UV map is ""UVMap" is **active for rendering**, but the UV map "Whole" is **also specified in the shader editor** for some elements of the material; **Switch the active UV map to "SimpleBake"** (this third UV map is a unwrap of the entire model) , then Bake **emission**. [system-info.txt](https://archive.blender.org/developer/F6325954/system-info.txt) [Problem.blend](https://archive.blender.org/developer/F6325958/Problem.blend) In previous betas this would achieve the expected result (i.e. it would bake the white emission windows - using the UVmap active for rendering, and the one one manually specified in the shader editor. In the newer betas this results in a totally Black bake (for me, anyway). Given how this used to work fine and now doesn't, and at one point I had two computers with older and newer betas that gave different results, I believe this to be a bug that has crept in in the recent betas

Lewis Toohey commented

2019-01-18 10:01:56 +01:00

Added subscriber: @lewis2e