Update blender_video example to use a .blend file

[ekzhang]

I attached a pretty simple .blend file here with a transmissive material to illustrate more of the Cycles renderer, but we insert any .blend file really.

modal-blender-video.mp4

Type of Change

• Example updates (Bug fixes, new features, etc.)

Checklist

• Example is testable in synthetic monitoring system, or lambda-test: false is added to example frontmatter (---)
  • Example is tested by executing with modal run or an alternative cmd is provided in the example frontmatter (e.g. cmd: ["modal", "deploy"])
  • Example is tested by running with no arguments or the args are provided in the example frontmatter (e.g. args: ["--prompt", "Formula for room temperature superconductor:"]
• Example is documented with comments throughout, in a Literate Programming style.
• Example does not require third-party dependencies to be installed locally
• Example pins its dependencies
  • Example pins container images to a stable tag, not a dynamic tag like latest
  • Example specifies a python_version for the base image, if it is used
  • Example pins all dependencies to at least minor version, ~=x.y.z or ==x.y
  • Example dependencies with version < 1 are pinned to patch version, ==0.y.z

[ekzhang]

This is kind of interesting @charlesfrye but we kind of accidentally rebuilt a GPU render farm

https://blendergrid.com

[charlesfrye]

Thanks for cleaning this up! I get the sense that using the bpy interface the way I was doing it is very uncommon.

And glad to see the new Run CI test fired with a true positive.