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maximeraafat avatar maximeraafat commented on May 21, 2024 1

Hi, let me provide some details to answer this question. "Evaluating" a test image in Blender simply boils down to rendering the frame in question. In contrast, NeRF, or in this case Instant NPG, first trains a model to learn the 3D scene, and is then capable of predicting an image, given a camera.

Depending on your hardware, the rendering parameters and the scene complexity (geometry and materials), Blender can take minutes to hours to render a single frame, especially if using Blender's path-tracer, Cycles. When rendering small scenes (simple geometry and materials) with Blender's real-time rasteriser, Eevee, Blender usually performs quite fast. But even with Eevee, rendering a single frame can still take from seconds to minutes.

Instant NGP on the other side, will take from a few seconds to a very few minutes to train its NeRF model, and is then capable of predicting a test image way faster than almost any renderer. Therefore, when testing on hundreds of images, Instant NGP will be drastically faster than Blender.

from blendernerf.

SSground avatar SSground commented on May 21, 2024

Hi, let me provide some details to answer this question. "Evaluating" a test image in Blender simply boils down to rendering the frame in question. In contrast, NeRF, or in this case Instant NPG, first trains a model to learn the 3D scene, and is then capable of predicting an image, given a camera.

Depending on your hardware, the rendering parameters and the scene complexity (geometry and materials), Blender can take minutes to hours to render a single frame, especially if using Blender's path-tracer, Cycles. When rendering small scenes (simple geometry and materials) with Blender's real-time rasteriser, Eevee, Blender usually performs quite fast. But even with Eevee, rendering a single frame can still take from seconds to minutes.

Instant NGP on the other side, will take from a few seconds to a very few minutes to train its NeRF model, and is then capable of predicting a test image way faster than almost any renderer. Therefore, when testing on hundreds of images, Instant NGP will be drastically faster than Blender.

Thanks your answer.

from blendernerf.

NowLoadY avatar NowLoadY commented on May 21, 2024

!!! sounds great! I will try it

from blendernerf.

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