RenderPark: a photorealistic rendering tool

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A Photorealistic Rendering Tool
Old Picture Gallery

All screenshots were generated with RenderPark, on an SGI Octane R10000
Click here for the new image gallery.

Click on the tumbnails for larger images ....

Some caustic and transparency pictures.

	The reflective ring focusses light on the floor and generates a caustic there. This image was generated with bidirectional path tracing
	A box and a glass sphere. Note the caustics from the glass sphere. This image was generated with bidirectional path tracing

Hierarchical monte carlo radiosity for large scenes

Check out the paper if you're interested and want more (technical) information about this method.

	Conference room (125.000 polygons, 9 minutes to compute full radiosity solution) Model credits -- Anat Grynberg and Greg Ward (Lawrence Berkeley Laboratory, Berkeley, California)
	Candlestick Theatre (39.000 polygons, 5 minutes to compute full radiosity solution) RenderPark allows you to save full radiosity solutions as VRML 2.0 models, so they can be viewed with any VRML viewer. Check out the VRML model of the fully illuminated theatre. Model credits -- Design: Mark Mack Architects, 3D Model: Charles Ehrlich and Greg Ward (work conducted as a research project during the Architecture 239X course taught by Kevin Matthews formerly at UC Berkeley, College of Environmental Design)
	Cubicle office space overview (128.000 polygons, refined to 506.000 elements after computation, 10 minutes to compute full radiosity solution) Model credits -- Anat Grynberg and Greg Ward (Lawrence Berkeley Laboratory, Berkeley, California)
	Cubicle office space close up Model credits -- Anat Grynberg and Greg Ward (Lawrence Berkeley Laboratory, Berkeley, California)

RenderPark image postprocessing with Radiance tools

Image output to high dynamic range TIFF format was introduced in RenderPark in the 980828 snapshot. It allows image postprocessing using the large collection of tools that come with the Radiance synthetic lighting software system. Some examples:

This picture shows the effect due to different orders of reflection of light on the illumination in a simple scene. The top row shows illumination up to 0, 1, etc orders of interreflection. The bottom row shows the contribution due to 0, 1 etc.. interreflection order only.

The top images were computed using bidirectional path tracing and saved in high dynamic range TIFF format. They were next converted to Radiance pic format using ra_tiff. The difference between successive images was then computed using the pcomb program and converted back to "normal" TIFF using ra_tiff again.

Visualisation of the luminance in a scene using isolux contours.

The picture was rendering using bidirectional path tracing, next converted to Radiance pic format using ra_tiff. The falsecolor program did the rest of the trick.

Radiosity rules in the hospital...

	A view of a small part of a hospital. Image generated with hierarchical monte carlo radiosity (HWDRS)
	Another view of the hospital. Note the 'design' luminaires, causing mostly indirect illumination in the room. Image generated with hierarchical monte carlo radiosity (HWDRS)

Some older screenshots

A wireframe drawing of the 'Hospital' scene, looked on from above.

The controlpanel when choosing for Galerkin radiosity. Some of the displayed options are not yet available in the public distribution, but give you a taste of what to expect ...

A radiosity solution rendered with view-importance Southwell / Galerkin radiosity. The camera is located in the lobby.

The same solution, but looked at from a different point of view. Note how the radiosity solution is only computed in those areas which are important for the light transports that contribute to the primary view.

The solution which would have been obtained without view-importance. The compuations are evenly spread across the scene, wihout taking into account relative view importance.

[an error occurred while processing this directive]Last modified: Thursday, 19 February 2009 .

	A wireframe drawing of the 'Hospital' scene, looked on from above.
	The controlpanel when choosing for Galerkin radiosity. Some of the displayed options are not yet available in the public distribution, but give you a taste of what to expect ...
	A radiosity solution rendered with view-importance Southwell / Galerkin radiosity. The camera is located in the lobby.
	The same solution, but looked at from a different point of view. Note how the radiosity solution is only computed in those areas which are important for the light transports that contribute to the primary view.
	The solution which would have been obtained without view-importance. The compuations are evenly spread across the scene, wihout taking into account relative view importance.