EEVEE: Lookdev: Add support for partially blurred background

This is using the GGX probe as background. This has the drawback of
having the resolution choosed in the indirect lighting setting.
The blurring is not really high-quality.

The pros is that it has a simple implementation and is fast to evaluate.

This patch also fades the background alpha to make overlay engine draw the
default background color in the correct color space. Removing one colorspace
hack.

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D6895

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_view3d_types.h b/source/blender/makesdna/DNA_view3d_types.h
index 9a3bbee115b..c45a1480087 100644
--- a/source/blender/makesdna/DNA_view3d_types.h
+++ b/source/blender/makesdna/DNA_view3d_types.h
@@ -170,6 +170,7 @@ typedef struct View3DShading {
   float studiolight_rot_z;
   float studiolight_background;
   float studiolight_intensity;
+  float studiolight_blur;
 
   float object_outline_color[3];
   float xray_alpha;
@@ -185,7 +186,6 @@ typedef struct View3DShading {
 
   /* Render pass displayed in the viewport. Is an `eScenePassType` where one bit is set */
   int render_pass;
-  char _pad2[4];
 
   struct IDProperty *prop;
 } View3DShading;