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Drongle McMahon

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About Drongle McMahon

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  1. Might I not just as well say that's simply an alternative kludge to the balance triangle, either being used to overcome the omission of origin offset from mesh uploads, both wasting resources? Origin offset was tested in beta but the dropped. Did anyone discover the reason for that?
  2. I just want to add a point about the option(s) for including textures in the mesh upload (ass opposed to uploading them separately and applying them inworld). I have used a lot of re-usable (usually seamless) textures on many different items. This has the advantage of minimizing the texture downloading lag where the texture is used on multiple items in a location. Each time you upload the exact same texture with a different (or the same) mesh, however, the system treats it as a completely separate texture. Thus it receives a new ID, occupies a new slot in the asset database, and has to be down
  3. I'vw always wondered why this can work, because the viewer has code that is supposed to eliminate deegenerate triangles before uploading them. It even has an minimum tolerance built in so that vertices don't have to be exactly identical to make a triangle degenerate. It may be similar to the unused first vertex trick. That is, if the degenerate triangle culling only happens after the update of the mesh extents. I'll have to see if I can get motivated to look into the source code again!
  4. Also note that if any of the maximum eight materiasls has more than 21844 triangles in a <polylist> a new material will be silently generated. Then there will be more than eight and the model will be split. This process can be accompanied by several other horrible effects.
  5. Are those black parts of the preview part of the model that you removed in the physics mesh? If so, you need to be aware that the physics model (of each mesh object if there are more than one) gets stretched and/or squashed to fit the bounding box of the high LOD (reference) mesh. To stop that distorting the physics, you need to make sure the physics model has the same bounding box as the main model. In this case, you may have to add back some geometry to bring its height to the same as that of the visual model. Otherwise, if those are parts of the physics, so that the physics is taller
  6. Hmm. In the mesh forum we have often had long discussions, lasting several days, that have resulted in notes being added to the earliest replies correcting or extending the adivice there. With the time limit, this will no longer be possible. That will mean users who share the problem having to read thtough the whole long thread to discover the corrections. That is a pity. I suppose I will have to assume the perceived benefits of the time limit, whatever they may be, are worth this negative effect.
  7. "You need to look more closely Drongle" Oh well, there's hope then. Still, I'm not going to be happy until we can upload images to the forum's own archive. I don't want to have to starty using third party sites. The accumulated images we have posted, especially you, Aquila, comprise a valuable store of guidance that needs to be kep together with the accompanying texts. I also agree with your wish to be able to peruse my own images - that's by far the most effective method I found for locating and linking to old posts. I haven't used a quote here because it's far to large and intrusiv
  8. From my first glance at my own posts in the Mesh Forum, it appears that all pictures have disappeared. That renders most of the more useful posts in that forum completely useless. Anyone know if this is a permanent situation? I see there's an insert "image from url" at the bottom, but apparently no direct upload option, and nothing exists in in the "existing attachments".
  9. When you link prims to mesh, they switch from legfacy prim LI accounting to mesh-type LI accounting. In Many cases this will increase the LI. The more you distort the prims, the more the increase is likely to be. Toruses are particularly bad. If you restrict your physics prims, as far as possible, to cubes with no distortion other than stretching, cylinders with only stretching the long axis (ie perfectly circular section), and undistorted spheres, these will use physics engine primitives which are the lowest possible physics weight. As soon as you distort them further, the physics weights wil
  10. Degenerate triangles are triangles with (nearly) zero area. This can be either because two vertices are identical or because all three lie on a straight line. Doesn't have to be exactly zero because the code uses a very small number that it treats as effectively zero. So if you have very small triangles they might be treated as degenerate although they aren't exactly zero. In Blender you can do Mesh->Clean up->Degenerate dissolve, which will eliminate them. An option will appear at the bottom of the toolbox (on the left) where you can set how close vertices have to be to be merged. As l
  11. True - you can avoid the alpha problem with the (new) alpha mode settings. But - False - png format can be 24 or 32 bit (i.e. with or without alpha channel. Not sure how you tell photoshop, but in Gimp I just merge image to one layer and remove the alpha channel. Then it automatically exports png as 24 bit without an alpha channel. You can see that both in the export dialog and after import where there's no alpha mode options.
  12. In addition to the per-file overhead, the multiple texture option also involves more transactions with the database and server. It will also allow finer distribution of avalable texture area between faces according to their sizes (unless you need only fixed size sub-textures. However, there are a couple of considerations that might swing the comparison the other way. You should avoid mixing alpha and non-alpha areas in the same big texture, as doing so will use more data for the latter (32 bit/pixel vs24) and will probably cause alpha sorting artefacts with the textures that don't need alpha
  13. Just to add to Aquila's post - one of the 9 materials here is actually only on the back and bottom of the steps. Both these surfaces are hidden and will never be rendered (unless you turn the whole thing upside-down). So you can safely delete these faces, and then you have only the permitted eight. (SL will now import objects with more than eight materials, but it does so by splitting them into multiple objects). More generally, we have known for a long time that Sketchup works in ways that are very problematic for mesh imported to SL. One of the major problems is that it splits things into m
  14. "Is there an easy way to sort the vertice list in a dae file (or in Blender) in an exact specific order?" In Blender, there is a Mesh->Sort Elements menu that offers a few ways of sorting. It does sort the order the vertices come out in the collada file, as used in my recent offset origin kludge (using sort by distance from cursor). Whether that could produce the ordering you need, I don't know. The coordinate sorts are relative to the 3D view. Together with the cursor-relative one, you could achieve some complicated sorts by sequentially applying these, I suppose, but only a few simple o
  15. In my RL house, all the doors have exactly the same woodgrain pattern under the paint. That's because they are fake embossed hardboard underneath. It makes them look cheap and nasty to me (which, of course, they are). I am trying to decide whether I can afford to replace them with real wooden doors, because they annoy me too much. Nobody else notices. I think the same applies to objects and surfaces in SL. Avoiding repetition, even beyond simple tiling artefacts, can yield great improvement to the critical eye. But most eyes are not critical and you really have to weigh up the cost/benefit car
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