@@ -856,8 +856,14 @@
 					return string.format('data:%s;base64,%s', mime, ss.str.b64e(s.raw))
 				end
 			end
 			--figure out how to embed the given object
+			local function P(p) -- get prop
+				if b.props and b.props[p] then
+					return b.props[p]
+				end
+				return obj.props[p]
+			end
 			local embedActs = {
 				{ss.mime'image/*',       function(s,ctr)
 					if s == nil then
 						return {tag = "picture", nodes = {}}
@@ -868,13 +874,13 @@
 							idx = 1
 							fbimg = {
 								elt = 'img'; --fallback
 								attrs = {
-									alt = obj.props.desc or obj.props.detail or '';
-									title = obj.props.detail;
+									alt = P'desc' or P'detail' or '';
+									title = P'detail';
 									src = uri;
-									width = obj.props.width;
-									height = obj.props.height;
+									width = P'width';
+									height = P'height';
 								};
 							}
 						else idx = #ctr.nodes end
 						table.insert(ctr.nodes, idx, {
@@ -975,9 +981,9 @@
 					rtype[2](src, top)
 				end
 			end
 			local ft = flatten(top)
-			local cap = b.cap or obj.props.desc or obj.props.detail
+			local cap = b.cap or P'desc' or P'detail'
 			if b.mode == 'inline' then
 				-- TODO insert caption
 				return ft
 			else