Eevee: Material: Decouple transparent shadows from blend mode

This makes it easier to exclude a surface from casting shadows and can be
used to manipulate the shadows even for opaque surfaces.

Versionning ensure that old behavior is transfered to new rendering logic.

1 files changed, 22 insertions, 28 deletions

diff --git a/source/blender/draw/engines/eevee/eevee_materials.c b/source/blender/draw/engines/eevee/eevee_materials.c
index ad49d3f8ae7..99a3c0c06cc 100644
--- a/source/blender/draw/engines/eevee/eevee_materials.c
+++ b/source/blender/draw/engines/eevee/eevee_materials.c
@@ -1624,34 +1624,28 @@ void EEVEE_materials_cache_populate(EEVEE_Data *vedata, EEVEE_ViewLayerData *sld
 					}
 
 					/* Shadow Pass */
-					if (ma->use_nodes && ma->nodetree && (ma->blend_method != MA_BM_SOLID)) {
-						struct GPUMaterial *gpumat;
-						switch (ma->blend_shadow) {
-							case MA_BS_SOLID:
-								EEVEE_lights_cache_shcaster_add(
-								        sldata, stl, mat_geom[i], ob);
-								*cast_shadow = true;
-								break;
-							case MA_BS_CLIP:
-								gpumat = EEVEE_material_mesh_depth_get(scene, ma, false, true);
-								EEVEE_lights_cache_shcaster_material_add(
-								        sldata, psl, gpumat, mat_geom[i], ob, &ma->alpha_threshold);
-								*cast_shadow = true;
-								break;
-							case MA_BS_HASHED:
-								gpumat = EEVEE_material_mesh_depth_get(scene, ma, true, true);
-								EEVEE_lights_cache_shcaster_material_add(
-								        sldata, psl, gpumat, mat_geom[i], ob, NULL);
-								*cast_shadow = true;
-								break;
-							case MA_BS_NONE:
-							default:
-								break;
-						}
-					}
-					else {
-						EEVEE_lights_cache_shcaster_add(sldata, stl, mat_geom[i], ob);
-						*cast_shadow = true;
+					struct GPUMaterial *gpumat;
+					switch (ma->blend_shadow) {
+						case MA_BS_SOLID:
+							EEVEE_lights_cache_shcaster_add(
+							        sldata, stl, mat_geom[i], ob);
+							*cast_shadow = true;
+							break;
+						case MA_BS_CLIP:
+							gpumat = EEVEE_material_mesh_depth_get(scene, ma, false, true);
+							EEVEE_lights_cache_shcaster_material_add(
+							        sldata, psl, gpumat, mat_geom[i], ob, &ma->alpha_threshold);
+							*cast_shadow = true;
+							break;
+						case MA_BS_HASHED:
+							gpumat = EEVEE_material_mesh_depth_get(scene, ma, true, true);
+							EEVEE_lights_cache_shcaster_material_add(
+							        sldata, psl, gpumat, mat_geom[i], ob, NULL);
+							*cast_shadow = true;
+							break;
+						case MA_BS_NONE:
+						default:
+							break;
 					}
 				}
 			}