Compute shader not modifying 3d texture

Question

I want to move the initialization of my 3D texture from the CPU to the GPU. As a test, I wrote a shader to set all voxels to a constant value, but the texture is not modifie

Answer 1

Ugh. So apparently a 3D texture has to be bound as layered, otherwise the shader isn't able to modify any uvw coordinate with w>0.

glBindImageTexture(0, volume_tid, 0, /*layered=*/GL_TRUE, 0, GL_READ_WRITE, GL_R8);

does the trick.