Yes. If he has his own collection, you can earn money by selling 3d models. Creating high quality 3D models and simple 3D models requires acquiring skills, knowledge and a lot of time. If you have gained knowledge and skills and devoted your precious time to create your amazing 3d models, it is worth selling them.
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Would you like to sell your 3D models?
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Where can i Sell My Game Models?
How much money can i make selling 3D models?
How much money can you make on 3D Modeling?
Where can i find 3D Models Online?
Have fun - ArtGraphic3D