Fix T77267: Render EEVEE AO pass when AO disabled.

In EEVEE the AO renderpass influenced other render passes. Until now the
pass wasn't selectable when AO was disabled in the scene to remove these
render artifacts.

This patch allows rendering EEVEE AO pass without enabling it in the
scene. It does this by binding a fallback texture that is used by the
surface shaders.

Reviewed By: Clément Foucault

Differential Revision: https://developer.blender.org/D7956

1 files changed, 3 insertions, 2 deletions

diff --git a/source/blender/draw/engines/eevee/eevee_private.h b/source/blender/draw/engines/eevee/eevee_private.h
index 1e2de521cdf..40d7676c38c 100644
--- a/source/blender/draw/engines/eevee/eevee_private.h
+++ b/source/blender/draw/engines/eevee/eevee_private.h
@@ -679,8 +679,9 @@ typedef struct EEVEE_EffectsInfo {
   struct DRWView *taa_view;
   /* Ambient Occlusion */
   int ao_depth_layer;
-  struct GPUTexture *ao_src_depth;  /* pointer copy */
-  struct GPUTexture *gtao_horizons; /* Textures from pool */
+  struct GPUTexture *ao_src_depth;             /* pointer copy */
+  struct GPUTexture *gtao_horizons;            /* Textures from pool */
+  struct GPUTexture *gtao_horizons_renderpass; /* Texture when rendering render pass */
   struct GPUTexture *gtao_horizons_debug;
   /* Motion Blur */
   float current_ndc_to_world[4][4];