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About rijklau

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  1. For objects like that in the photo, which is an acrylic display stand, the base should be a rectangle with four 90 degrees angles. And so is the first vertical piece, should be 90 degrees upwards from the ground. But the bending of the vertical part usually is done by hand, so it might not be perfect.
  2. 😅 If those are the cases, there is no way that we can align the camera. And we cannot even get the product done without knowing the angles of the actual faces.
  3. Still, you need to move the "face", i.e. 4 points at a time in order for the movement to be perpendicular to the opposite side, so as to maintain the faces to be parallel to each other. And you have to make sure the sides are aligned to the axis. Then we get back to the original problem of aligning the axis to the camera view.
  4. Would that made the model not have parallel sides in orthographic views?
  5. They might just randomly snap the photo from shop display and said, I want it to have a 25.4 cm base. Or even worse, they just copy it from a magazine.
  6. I've checked. Thanks @Bobby for that. But still, the depth of the item is a visual guess. And the model did not match the perspective in the camera view. If this is for SFX, the resulted composite will look off. Looks like now I'm going for 2 things, 1. Make the item as in the photo, 2. Match it to the view in the photo. 😅
  7. Hi Bobby, I'm not sure if using the Shear or Perspective tool can create an orthographic projection with the correct measurements. It might work if I have all the dimensions and distort a face to get the relative position of the inside details, but probably cannot get an exact dimension of the other sides...
  8. First of all, thank you everyone for responding. For everybody's information, the easiest way to solve the problem was to ask the client for the remaining measurements, and I did, and got it. Why I don't want to do that in the first place was that the "asking" process needs to go down a chain of people and would pass along a message of "are you serious, so little information and you want us to make a product? Are you a idiot?"😁 to the client. And even thought I got the measurements, the client gave me the wrong incline angle of the top piece. And it is also likely that the measurements were what the client hopes for and not what were in the photo. So the initial question is now just a brain exercise. If you guys have time to spare (like stuck in lock down), please keep ideas coming. I though this problem was common in people working in SFX or post production having the need, like to match a product rendering into a real background photo. I know even architects used to match building renderings into real on site photos. But in these cases, at least they know the exact dimension of the building, and the site. Rhino has a function that if you have the exact dimension of an object in a photo, and you have an 3D object built to that exact dimension, it can match the camera view to the photo by inputting six pairs of corresponding points. This has no use with the current problem, but just for interest, can current A:M version do something similar? robcat2075: I googled "how to calculate length from a perspective" and get these promising but "over my head" results. In short, my maths sucks: how to calculate length from a perspective - https://www.math.utah.edu/~treiberg/Perspect/Perspect.htm Perspective Calculator - Divide drawing into equal regions - https://www.theproblemsite.com/educational-resources/perspective/horizontal Perspective length tool - ImageMeter - photo measure - https://imagemeter.com/ The last is actually an Apps that can do the measurement if you have just a single measurement. Free to evaluate in your phone. Wonder why these search results did not came up the date I posted my question... More appropriate to answer your question, (googled "how to calculate lens focal length from photos") : How can I calculate focal length from a photograph? - https://photo.stackexchange.com/questions/21616/how-can-i-calculate-focal-length-from-a-photograph
  9. The picture was form a customer, so I don't have the camera. The small picture attached is the original. The one with white background is adjusted for use as camera roto. The only dimension known is the long side of the base, which is 254 mm. Also is a screen capture form A:M. The highlighted object is built as 25.4 cm square in A:M. So I thought if I can match the side and perspective to the photo, I can model the item inside choreography. So far using hot keys to manipulate the camera in camera view is total miss and no hit. The item is simple but the task is hard.😄 Any help is welcome.
  10. Hi all, I need to model an item with just a photo, and one measurement of a side of the item. I thought I could set up an choreography with the camera matching the perspective of the photo, then model the item there. But after an hour trying to set the camera, still no go. Anyone have done this before, or has this been discussed before? Cheers, Rijk
  11. PayPal invoice actually.
  12. Customer service offered to send me an upgrade invoice to upgrade my now expired yearly subscription to full non-expire version, around three weeks ago. Never heard from them since.
  13. Okay, still no word from anyone. Thanks again Rodney. Probably wasted your "gift". No more work done with A:M...
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