Nicely modeled scene. Unfortunately it seems to me that your GI is being killed as soon as it hits any surface other than the floor. There would almost certainly be alot more ambient light, the GI should be bouncing off all the surfaces in the scene. But the green is soaking it up like a sponge. I don't know what render engine you used but this definitely needs tweaking to get a more realistic look. Nice job on the chairs and table though

Nice job improving the bounce light, but now you have a common problem when using colours such as this. The returning light from the walls is turning everything green. To overcome this problem you need to use the MTLOVERRIDE material, this will kill the colour returning from the walls but still allow the GI to bounce correctly. Giving you much better lighting and GI.

Good effect of shadows. However I think the green is very intense compromising the rest of the image.

Nice work author...gl