Hi everybody! My name is Jonas Eschenburg and I'm a software developer living in Augsburg, Germany. I am currently developing "BitWrk", an open marketplace for on-demand computing power.
Blender is an important use case for my project as, in my opinion, it could benefit heavily from having an open renderfarm, grid-like service. If you're interested, please have a look at <http://bitwrk.net/> I have begun writing integration code using Blender's Python scripting interface and so far, everything has been a nice experience. There is one problem I haven't yet managed to solve, though. I seem to be unable to load renderings (.exr files) produced by Blender back into the render result. The render result image stays empty. Here is the Python script I used (execute, select "Dummy rendering", hit F12): ------------------------------------------------------------ import bpy class DummyRenderEngine(bpy.types.RenderEngine): """Dummy Rendering Engine""" bl_idname = "DUMMY_RENDER" bl_label = "Dummy rendering" def render(self, scene): result = self.begin_result(0,0,320,200) result.load_from_file("/tmp/example.exr") self.end_result(result) def register(): bpy.utils.register_class(DummyRenderEngine) def unregister(): bpy.utils.unregister_class(DummyRenderEngine) if __name__ == "__main__": register() ------------------------------------------------------------ Here is what the console says: ------------------------------------------------------------ IMB_exrtile_set_channel error RenderLayer.Combined.R IMB_exrtile_set_channel error RenderLayer.Combined.G IMB_exrtile_set_channel error RenderLayer.Combined.B IMB_exrtile_set_channel error RenderLayer.Combined.A IMB_exrtile_set_channel error RenderLayer.Depth.Z warning, channel with no rect set A warning, channel with no rect set B warning, channel with no rect set G warning, channel with no rect set R warning, channel with no rect set Z OpenEXR-readPixels: ERROR: Error reading pixel data from image file "/tmp/example.exr". No frame buffer specified as pixel data destination. ------------------------------------------------------------ Here is some information about the EXR file I used, generated by exrheader: ------------------------------------------------------------ file format version: 2, flags 0x0 Camera (type string): "Camera" Date (type string): "2014/01/19 18:42:29" File (type string): "/var/folders/1y/jvd5p46x5z70cdlz3f4tk7880000gn/T/tmplg5y08/input.blend" Frame (type string): "34" RenderTime (type string): "01:11.83" Scene (type string): "Scene" Time (type string): "00:00:01.10" channels (type chlist): A, 32-bit floating-point, sampling 1 1 B, 32-bit floating-point, sampling 1 1 G, 32-bit floating-point, sampling 1 1 R, 32-bit floating-point, sampling 1 1 Z, 32-bit floating-point, sampling 1 1 compression (type compression): piz dataWindow (type box2i): (0 0) - (319 199) displayWindow (type box2i): (0 0) - (319 199) lineOrder (type lineOrder): increasing y pixelAspectRatio (type float): 1 screenWindowCenter (type v2f): (0 0) screenWindowWidth (type float): 1 type (type string): "scanlineimage" xDensity (type float): 72 ------------------------------------------------------------ I also tried out a couple of variations, without success: - With and without Z buffer - With 'PIZ' and without compression In case you suspect the EXR file to be faulty, please have a look at it: <http://files.bitwrk.net/example.exr>. If I just load it from file system, it displays fine. What do I need to do to get an EXR image into the render result? Thanks in advance! Jonas _______________________________________________ Bf-committers mailing list [email protected] http://lists.blender.org/mailman/listinfo/bf-committers
