I am very new to Reality Capture but in a week or so I have gotten more and more confident with the program and wanted to share my big learns during the last week or so...
- Take, take, take, take and TAKE pictures, just keep on taking every possible angle. Think of it as you have a sphere or dome with your subject in the very centre and the shell of the dome or sphere representing where your camera has been. If you surround your subject with pictures and make small movements between each frame you should have no trouble aligning your 3D Scan. This advice is in so many tutorials but it is just so important. Technically it feels like if you take enough images you won't have to worry about control points and all that painstaking stuff!
- Try and keep exposure, white balance all even with nice sharp pics and don't be afraid to use f/11 for depth of field.
- If a part of your model has holes or just isn't rendering right, if it hasn't moved and you can, go back out and take more more detailed images of that part (and lots of them) then come back and try and realign and those new images should just slot right in and your holes hopefully will disappear.
- Really smooth or shiny surfaces will give you problems.
- Once you have alignment sorted the rest is quite straightforward but the most important part of the process is alignment. Get that right and your model will be great! If you align and you have multiple components in Alignment settings try changing overlap to Low and Increase features per image I often use 80000. In the advanced settings try increasing preselector features to half the Features per Image number so 40000 and Increase Detector Sensitivity to High (be careful if using ultra - long process times and could get weird effects)
- Watch all the tutorials you can on Ground Point and Reconstruction Boxes get those two sorted and life is so much easier!
That's my take on Reality Capture after almost two or so weeks. I made a model of some bananas and a pineapple on our kitchen island the other night, I was amazed at the detail RC recreated, even all those spiky bits that stick out from the pineapple were rendered perfectly in 3D.
Good luck with your learning the software. I'm now testing drones and having some great success in making 3D scans from the air.
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