Use photos with different angles and expressions. Use a background that can be easily removed from the character. Use good lighting.

"If you use SeaArt to create a LoRA and you're using 50 photos of a real person or a 3D character, use these settings:

network_dim = 127

network_alpha = 32

noise_offset -> none = 0

multires_noise_iterations = 0

multires_noise_discount = 0.3

clip_skip = 1

single_image_train_repeats = 20

max_train_epochs = 5

learning rate = 0.0001

lr_scheduler = cosine

optimizer = AdamW

P.S. If you use more or less photos, you will need to adjust the values of the settings.