Render shadows on entities.

Fixes problem with mod 'drawers'.

src/client/content_cao.cpp

@@ -1322,6 +1322,12 @@ void GenericCAO::updateTextures(std::string mod)
 	m_current_texture_modifier = mod;
 	m_glow = m_prop.glow;
 
+	video::ITexture *shadow_texture = nullptr;
+	if (auto shadow = RenderingEngine::get_shadow_renderer())
+		shadow_texture = shadow->get_texture();
+
+	const u32 TEXTURE_LAYER_SHADOW = 3;
+
 	if (m_spritenode) {
 		if (m_prop.visual == "sprite") {
 			std::string texturestring = "no_texture.png";
@@ -1332,6 +1338,7 @@ void GenericCAO::updateTextures(std::string mod)
 			m_spritenode->getMaterial(0).MaterialTypeParam = 0.5f;
 			m_spritenode->setMaterialTexture(0,
 					tsrc->getTextureForMesh(texturestring));
+			m_spritenode->setMaterialTexture(TEXTURE_LAYER_SHADOW, shadow_texture);
 
 			// This allows setting per-material colors. However, until a real lighting
 			// system is added, the code below will have no effect. Once MineTest
@@ -1367,6 +1374,7 @@ void GenericCAO::updateTextures(std::string mod)
 				material.MaterialType = m_material_type;
 				material.MaterialTypeParam = 0.5f;
 				material.TextureLayer[0].Texture = texture;
+				material.TextureLayer[TEXTURE_LAYER_SHADOW].Texture = shadow_texture;
 				material.setFlag(video::EMF_LIGHTING, true);
 				material.setFlag(video::EMF_BILINEAR_FILTER, false);
 				material.setFlag(video::EMF_BACK_FACE_CULLING, m_prop.backface_culling);
@@ -1417,6 +1425,7 @@ void GenericCAO::updateTextures(std::string mod)
 				material.setFlag(video::EMF_BILINEAR_FILTER, false);
 				material.setTexture(0,
 						tsrc->getTextureForMesh(texturestring));
+				material.setTexture(TEXTURE_LAYER_SHADOW, shadow_texture);
 				material.getTextureMatrix(0).makeIdentity();
 
 				// This allows setting per-material colors. However, until a real lighting
@@ -1443,6 +1452,7 @@ void GenericCAO::updateTextures(std::string mod)
 				scene::IMeshBuffer *buf = mesh->getMeshBuffer(0);
 				buf->getMaterial().setTexture(0,
 						tsrc->getTextureForMesh(tname));
+				buf->getMaterial().setTexture(TEXTURE_LAYER_SHADOW, shadow_texture);
 
 				// This allows setting per-material colors. However, until a real lighting
 				// system is added, the code below will have no effect. Once MineTest
@@ -1467,6 +1477,7 @@ void GenericCAO::updateTextures(std::string mod)
 				scene::IMeshBuffer *buf = mesh->getMeshBuffer(1);
 				buf->getMaterial().setTexture(0,
 						tsrc->getTextureForMesh(tname));
+				buf->getMaterial().setTexture(TEXTURE_LAYER_SHADOW, shadow_texture);
 
 				// This allows setting per-material colors. However, until a real lighting
 				// system is added, the code below will have no effect. Once MineTest