Yes, you are right. the size is different . I am trying to apply conditional GAN. The volumes are the condition and 100 is the size of the noise for generator. I need to cat the condition and noise in generator . and cat the condition with the training datasets in the discriminator. The size of noise for cat is 100 and the size of training dataset is 21x21. I don’t know how to embed to have these size for the conditions (volume) and cat with the noise for generator and training data (21x21) for discriminator.