how to activate rendering

[ava6969]

i built
file:///home/dewe/lab/bazel-bin/deepmind_lab.so
file:///home/dewe/lab/bazel-bin/libdmlab_headless_hw.so
file:///home/dewe/lab/bazel-bin/libdmlab_headless_sw.so
with --define=osmesa_or_glx

do i choose sdl if i want actual video rendering, just for debugging reasons.

[tkoeppe]

I think you want --define=graphics=sdl for that. (Note also that the other settings are --define=graphics=osmesa_or_glx etc.)

You wouldn't be using the "headless" versions then, but instead the "headful" version that uses SDL for on-screen drawing.