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bytedance / MVDream

Multi-view Diffusion for 3D Generation
MIT License
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Generation speed quite different #18

Open r530044129 opened 11 months ago

r530044129 commented 11 months ago

From my observation, the gereration speed are quite different between different prompt.

Some quick just need 1 hour maybe(GPU 3090), but some need cost 20+ hours.

Is that right that some prompt will cost far more time than other? Or is most of the generation time the same, no matter what prompt it is?

seasonSH commented 11 months ago

Are you talking about the 3D generation with threestudio repo? The generation speeds would be affected by the prompt because InstantNGP does pruning when sampling along rays. However, I have never observed such a big difference between prompts. For example, the config without shading takes me 40-60 min on V100, never goes up to 2hours.

Can you share the prompt and results that cost you 20 hours?

r530044129 commented 11 months ago

yeah, it's 3d generation. You can try this one: 'Rhinoceros statue, art, Rhinoceros head', which cost me 12 hours and just arrive 8537 iter

Epoch 0: : 8539it [12:12:08, 5.14s/it]

Im not sure is that because my PC's problem or some GPU memory accumulation or something lead to such slow generation. I can feel very big difference between prompt. If there are some commom prompt, such as 'cat' \ 'dog' \ 'chair', it will be quick, but if there are some uncommon prompt, it will cost me a lot of time.