diff --git a/src/platform/climain.cpp b/src/platform/climain.cpp
index f41e242..1eff1ee 100644
--- a/src/platform/climain.cpp
+++ b/src/platform/climain.cpp
@@ -18,10 +18,10 @@ static void ShowUsage(const std::string &cmd) {
 
     Common options:
     -o, --output <pattern>
-        For an input file <basename>.slvs, replaces the '%%' symbol in <pattern>
-        with <basename> and uses it as output file. For example, when using
-        --output %%-2d.png for input files a.slvs and b.slvs, output files
-        a-2d.png and b-2d.png will be written.
+        For an input file <name>.slvs, replaces the '%%' symbol in <pattern>
+        with <name> and uses it as output file. For example, when using
+        --output %%-2d.png for input files f/a.slvs and f/b.slvs, output files
+        f/a-2d.png and f/b-2d.png will be written.
     -v, --view <direction>
         Selects the camera direction. <direction> can be one of "top", "bottom",
         "left", "right", "front", "back", or "isometric".
@@ -291,7 +291,11 @@ static bool RunCommand(const std::vector<std::string> args) {
         std::string outputFile = outputPattern;
         size_t replaceAt = outputFile.find('%');
         if(replaceAt != std::string::npos) {
-            outputFile.replace(replaceAt, 1, Basename(inputFile, /*stripExtension=*/true));
+            std::string outputSubst;
+            outputSubst  = Dirname(inputFile);
+            outputSubst += PATH_SEP;
+            outputSubst += Basename(inputFile, /*stripExtension=*/true);
+            outputFile.replace(replaceAt, 1, outputSubst);
         }
         std::string absOutputFile = PathFromCurrentDirectory(outputFile);