Depth estimation around the object is not correct

[maurock]

Hi, thank you so much for your great repository! I have a question about depth estimation. I have installed your modified version of the differentiable rasterizer and noticed that depth estimation is not precise around the object. This could be an issue, especially if we use depth images to map from 2D to 3D. Please check the image below, where I have set depth[depth==0]=15 for visualisation purposes. The area around the object is greater than 0, but not consistent with the obejct itself. Do you know why this is the case? Do you have any suggestions on how to address this so that we can map from depth images to 3D correctly? Thank you!