// Batch rendering workaround V3 - John Mather (NextDesign)
// Author page: https://www.creativecrash.com/users/john-mather
// Check for updates here: https://simplymaya.com/forum/showthread.php?p=318227
string $filename = "render";

int $startFrame = 1;
int $endFrame = 24;

string $directory = (`workspace -q -rd` + "images/");

// check for render panel. Found here: https://www.creativecrash.com/forums/mel/topics/error-object-not-found-renderview
string $renderPanel;
string $renderPanels[] = `getPanel -scriptType "renderWindowPanel"`;

if(size($renderPanels)) 
    $renderPanel = $renderPanels[0];
else
{
    $renderPanel = `scriptedPanel -type "renderWindowPanel" -unParent renderView`;

    scriptedPanel -e -label "Render View" $renderPanel;
}

for ($i = $startFrame; $i <= $endFrame; $i++)
{
    currentTime $i;

    renderWindowRender redoPreviousRender renderView;

    string $concatFilename = $directory + $filename + "." + $i;

    if (`getApplicationVersionAsFloat` >= 2011)
        // Thanks to nowayfra on creativecrash for his workaround
        catch(eval(renderWindowSaveImageCallback ($renderPanel, $concatFilename, `getAttr defaultRenderGlobals.imageFormat`)));
    else
        renderWindowSaveImageCallback ($renderPanel, $concatFilename, `getAttr defaultRenderGlobals.imageFormat`);

    print ("Saved " + $concatFilename + "\n");
}

print ("Completed rendering of " + (($endFrame - $startFrame) + 1) + " frames.\n");