Load blend files: Dimensions change completely

[rkolamur]

Hi all!

I created a blend file with all the objects, cameras, lighting, material properties, etc. This blend file has specific units and scale settings. Let's call it A.blend. Now, I would like to load this blend file, manipulate objects in it and then store the rendered image using blenderproc. For that, I run a test script in debug mode and make the function call to blenderproc.load_blend(A.blend).

However, the file when loaded has been changed completely. I now have the objects with dimensions much different from the original dimensions. Can someone please help me with the current situation?

Also, is there a more direct way to use blenderproc directly? I would ideally like to have a .blend file with its own python script. Then I would like to initialize the objects as blenderproc objects and manipulate them. I am able to do it in debug mode. However, I cannot run blenderproc again when I close and open it as it uses the blender's own installation instead of blenderproc's one. Please help. Thank you!

[cornerfarmer]

Hey @rkolamur,

when loading objs from a blend file. The size should usually be preserved. Do you have any special relations between the objects?

Regarding your last question: blenderproc requires blender to be started with certain arguments and env vars (see https://github.com/DLR-RM/BlenderProc/blob/main/blenderproc/command_line.py#L182). If you start blender in the same way it should work, however its not recommended.

[rkolamur]

Hi @cornerfarmer,

Thank you for the reply.

They are not preserved in my case. There are no special relations or constraints between the objects. However, the scale and dimensions in my blender file are changed according to my use case.

Thank you. May I know why it is not recommended? Also, it will be extremely helpful if you can make the BlenderProc as a Python package that we can use in any blender file. I do not use the datasets and need control of the scene that bpy offers. There might be other people with similar use cases. Please consider.