[Feature request] please reanimate SDF rendering with path tracing and new DXR features

[trsh]

I tried the fallowing

# Create materials
sdfGridMaterial = StandardMaterial('SDF Grid')
sdfGridMaterial.baseColor = float4(1.0, 0.5, 0.5, 1.0)
sdfGridMaterial.specularParams = float4(0.001)

# Create SDF grids

sdfGrid = SDFGrid.createNDGrid(narrowBandThickness=2.5)
sdfGrid.generateCheeseValues(128, 0)

sceneBuilder.addSDFGridInstance(
    sceneBuilder.addNode('SDFGrid', Transform()),
    sceneBuilder.addSDFGrid(sdfGrid, sdfGridMaterial)
)

# Create camera

camera = Camera()
camera.position = float3(1, 1, 1)
camera.target = float3(0, 0, 0)
camera.up = float3(0, 1, 0)
camera.focalLength = 35.0
sceneBuilder.addCamera(camera)

# Create environment map
envMap = EnvMap('LightProbes/hallstatt4_hd.hdr')
envMap.intensity = 3.0
envMap.rotation = float3(0, 45, 0)
sceneBuilder.envMap = envMap

with MinimalPathTracer. And it looks bad (dark spots and displaced mesh in cuts). And the performance when near the object drops dramatically (4 fps with RTX 3060).
I tried also SVO, SVS (and SBS) with same setup and it looked even worse, better performance, but still bad when close or inside a hole (~25 fps).