forked from BilalY/Rasagar
4.0 KiB
4.0 KiB
Path tracing reference
Properties
| Property | Description |
|---|---|
| State | When set to Enabled, HDRP uses path tracing. |
| LayerMask | Specifies the layers that path tracing includes. |
| Maximum Samples | Set the number of frames to accumulate for the final image. There is a progress bar at the bottom of the Scene view which indicates the current accumulation with respect to this value. |
| Minimum Depth | Set the minimum number of light bounces in each path. |
| Maximum Depth | Set the maximum number of light bounces in each path. You can not set this to be lower than Minimum Depth. Note: You can set this and Minimum Depth to 1 if you only want to direct lighting. You can set them both to 2 if you only want to visualize indirect lighting (which is only visible on the second bounce). |
| Maximum Intensity | Set a value to clamp the intensity of the light value each bounce returns. This avoids bright, isolated pixels in the final result. Note: This property can make the final image dimmer, so if the result looks dark, increase the value of this property. |
| Sky Importance Sampling | Set the sky sampling mode. Importance sampling favors the brightest directions, which is beneficial when using a sky model with high contrast and intense spots (like a sun, or street lights). On the other hand, it can be slightly detrimental when using a smooth, uniform sky. It's active by default for HDRI skies only, but can also be turned On and Off, regardless of the type of sky in use. |
| Seed Mode | Set how the path tracer generates random numbers. The seed is the pattern the noise has. When accumulating samples, every frame needs a different seed. Otherwise, the same noisy image gets accumulated over and over. Seed Mode has the following options: • Non Repeating: This is the default option. The seed is chosen based on the camera frame count. When the accumulation resets, it is not reset to zero. • Repeating: The seed is reset every time the accumulation is reset. Rendering of every image is done using the same random numbers. • Custom: Set the seed using a custom script. For more information, see the example in Understand path tracing. |
| Denoising | Denoises the output of the the path tracer. This setting is only available when you install the Unity Denoising Package. Denoising has the following options: • None: Does not denoise (this is the default option). • Intel Open Image Denoise : Uses the Intel Open Image Denoise library to denoise the frame. • NVIDIA OptiX : Uses NVIDIA OptiX to denoise the frame. You can also enable the following additional settings: • Use AOVs (Arbitrary Output Variables): Increases the amount of detail kept in the frame after HDRP denoises it. • Temporal: Improves the temporal consistency of denoised frame sequences. • Separate Volumetrics: Denoises the volumetric scattering effect separately for a smoother fog. When Separate Volumetrics is enabled, the Temporal setting will not improve volumetric fog temporal stability. |
Minimum Depth set to 1, Maximum Depth set to 2: direct and indirect lighting (1 bounce)
Minimum Depth set to 1, Maximum Depth set to 1: direct lighting only
Minimum Depth set to 2, Maximum Depth set to 2: indirect lighting only (1 bounce)
Denoising set to NVIDIA Optix, Separate Volumetrics set to Off
Denoising set to NVIDIA Optix, Separate Volumetrics set to On