Arbitrary Sculpture Weight
Currently, the only way to change the weight of a sculpture is through the Density slider on the Physical Properties tab. This is a slider that goes from 0.0% to 100.0%, with the actual weight displayed below in kilograms. This is fine for most use cases, but I find it can be difficult to fine tune the weight of a sculpture (or group) at times, especially for larger sculpts since even a 1% difference often changes its weight by several hundred kilograms at a time.
I'm not sure what the best solution to this would be, or how best to implement such a change without breaking existing content, but I don't see why we shouldn't have more direct control over a sculpt's weight, e.g. a slider where you can set an arbitrary weight value for that sculpt, and that's how much it'll weight regardless of its actual mass or scale.
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This is because if you scale the object up or down, it would naturally weigh more or less for the physics engine. Which is almost certainly what you'd want as a creator. Normally the literal actual weight doesn't really matter; what matters is how it interacts with other physical objects.
Anyhow... Until they add such a feature, if you find out what the 100% weight is, you can figure out what percentage you need to set it to to get it to the weight you want.
For example, at 100% it weighs 59873kg. You want it to weigh 100kg. 100 / 59873 = 0.0016702... * 100 (to get a percentage) = 0.16702... If you use L1+square on the slider you can set the percentage to a specific number. Set it to 0.16702. Now it should weigh something *close to* 100kg.
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TAPgiles The effect of the density tweak on a sculpt's mass is exponential, not linear. The equation is:
6 * density + 2.96867907
mass = 1kg * volume in cubic metres * ewhich limits the change in mass that the density tweak can achieve to a factor of 403.428793. Your example of reducing the mass of a 59873kg sculpt to 100kg is unsolvable because it reduces the mass by a factor of 598.73, which would require the density tweak to be set to -39.481%.
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Interesting...
But does that mean an object with a weight of 59873kg has a volume that, if created with any material that could theoretically exist, could not be 100kg in weight?! Like in physics whatsoever?!
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TAPgiles Dreams' upper bound of 403.428793 on the ratio of densities between materials is purely an artifact of that weird way in which a sculpt's "density" tweak affects its mass in Dreams. For the way the tweak works, it's quite misleading for it to be named "density". That name would be more appropriate for a tweak that behaved - like density in real world physics - in the linear way that you described. Real world physics doesn't place any such constraint on how different the densities of materials can be - for example osmium has a density of 22.59 g/cm³ and aerographite has a density of 0.00018 g/cm³, which makes a density ratio of 125500 - a few orders of magnitude more than what Dreams' physics can do - and those materials aren't even exotic matter.
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