Chaos Corona for 3ds Max > [Max] Feature Requests

3DS max point cloud render

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btam:
Hi,

I suspect it is not on the top of the feature list to implement but is it planned to render point cloud with Corona in 3DS max?

Tamas

btam:
Sorry it was late when I was sending this. I see it in the wrong forum. Could you please move it?Sorry about it.

atelieryork:
+1 from me. We had a job come in last week that was potentially going to involve a point cloud.

Out of interest, what kind of workflow for this are you currently using? We found that max could natively read a .PTS file but beyond that the data was basically useless. All you can do is view the cloud and change its display properties. No meshing controls or anything like that. How are you dealing with them?

btam:
Thx for moving the topic.

atelieryork: I own a land surveying company so I have experience with the processing of point clouds. I only use 3DS max/Corona as a private hobby and I'm not even good in it but I found Corona way better/easier then the builtin render engines (speed also seems better). So regarding the point clouds: Basically for buildings/etc it is much better to remodell it based on point cloud, but the process is time consuming (we use 3rd party Software and Revit for it). The other possibility is to create a mesh from point cloud but in that case vegetation could be a problem (or you need a very detailed on site measurement). Anway for the second method you need some additional software. There are some free/opensource program but in my experience if you have over 50M points they are not the best choice (i'm open always for learning something new so if anybody on different opinion could convince me). For opensource: Meshlab/Cloudcompare are the best start I think.

In the current situation we will build a new house with my wife so I have measured our land with laserscanner. Now the Architect has a preliminary design and I wanted to do some daylight analysis with the point cloud. Without it it would be very easy but there are some trees surrounding in the building so it would have been good to see how it's effect the sunlight in the house. The Mental Ray render seems to very slow and the result is not the best. If it wasn't  so slow it would be an option for indoor sun anyway.

Anyway if it will be implemented in Corona I wonder how they can solve the color problem. I was thinking grey point cloud which color receives/cast light/cast shadow. As the orgiginal RGB color of the point cloud is affected the real enviroment lights station by station the resultis very strange sometimes.

I really don't know how Corona works inside but I'm just curious about if it could be handled as a corona proxy or scatter object? The idea comes for me that with proxy you could switch to point cloud visualisation so I assume it is basically has that information in the file. In this case it would be "easy" to convert point cloud to a proxy object.

atelieryork:
Interesting! I've heard of meshlab and the process involving Revit but I've yet to see any good examples of cloud > mesh for a detailed interior, for example. It's something I'm going to look into more.

Cheers,

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