Mental Ray 2017 How To Provide Faster

Instead, the measured transmissivity of 72.0 from the NRC Daylighting Laboratory research was applied.

Overview This test case recreates the daylight simulation setup from a paper called Experimental Validation of Autodesk 3ds Max Design 2009 and Daysim 3.0 (Reinhart, 2009) using V-Ray Next for Autodesk 3ds Max 2017.

The referred experiment conducted by Reinhart compares the daylight simulation results with Autodesk 3ds Max Design 2009 software (3ds Max Design).

The goal we set with this test case is to compare how the advanced technology of V-Ray Next performs with the input of Autodesks initial research.

Mental Ray 2017 How To Provide Faster

Further, we explore how to provide faster and accurate renderer with better render image quality using Reinharts results as a benchmark.

Prerequisites As our starting point is the referenced paper, we should firstly outline several important things in relation to it.

That necessitated the use of an updated 3ds Max version for the test.

We used the 3ds Max version 2017, as Mental Ray is still integrated and shipped within the official version.

In regards to the provided features, 3ds Max fully covers 3ds Max Design ones.

Preparation of the 3D model and scene The test scene in this comparison case was recreated as close as possible to the referenced paper.

The 3d model was rebuilt using all available data for the research.

Missing detailed measurements for the window frames and wall thickness were adjusted to match the original model as there were no measurements provided for them in the research paper.

There is one thing intentionally altered in the scene - the unsupported Daylight system setup.

Instead, the complete system was replaced with a single VRayLight, type Dome.

Its texture was set to Physical Sun Sky Environment map being calculated with the exact same weather file placed in a Sun Positioner helper.

This setup translates successfully the Perez Sky model, originally used as Daylight sky in 3ds Max Design, into a map that is renderable in V-Ray Next.

The Dome texture resolution was increased to its maximum (8192) for most accurate sampling of the texture.

Since V-Ray Next is optimized to calculate light from Dome lights without the need of Light portals, there were none created and used in our scene.

Picture of the east room of the NRC Daylighting Laboratory where the original physical measurements took place Original Image found in Experimental Validation of Autodesk 3ds Max Design 2009 and Daysim 3.0 (Reinhart, 2009) Model recreation with V-Ray Next in 3Ds Max 2017 accentuated with VRayDirt and VRayToon Scene recreation with V-Ray Next in 3Ds Max 2017.

Note that the original photo documents a cloudy day while the measurements are executed on a sunny one, hence the sharp shadows in the rendered image.

Preparation of the materials V-Ray materials were assigned with the same parameter values as in the paper.

Only the refraction value of the glass material needed custom adjustment.

The window panels in our scene were created with separate objects for each glass pane.

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