In forward shading specular highlights appear to be much larger for very smooth materials in contrast to the deferred shader. In 4.14.3 the specular highlights were displaying correctly in forward shading. (See screenshot) Also know that I disabled bloom in the screenshot so you can better see the highlight.


Worked in Binary 4.14.3 CL 3249277
Broken in Binary 4.15.2 CL 3416026

Steps to Reproduce
  1. Open a blank project
  2. Create a new material
  3. Put a scalar of 1 in base color and 0 in roughness > save and compile
  4. Drag a simple sphere mesh into the default scene and apply the material
  5. Enable forward shading in the project settings

The specular highlight will be much larger and the bloom gets influenced much more as a result.

The visual appearance isn't much different from deferred shading.

Have Comments or More Details?

There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-45017 in the post.

Login to Vote

ComponentUE - Graphics Features
Affects Versions4.15.24.16
Target Fix4.16
Fix Commit3445437
Release Commit3445437
CreatedMay 15, 2017
ResolvedMay 18, 2017
UpdatedJun 7, 2017
View Jira Issue