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MCX Creating LOD's - missing wheels

rafikst

rafikst

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178
Country
poland
Hello, I have a question about creating LOD (model was for FS9, I converted it to P3Dv5)
Firstly I optimalized textures, next I did LOD:

Oryginal (LOD100)



After 3 LODs and removing the first (100).



but what I noticed, when I remove the first, oryginal LOD (20k, I dont need it) wheels from the rest LODs models disappeared.
What is a cause of it? Any idea what is wrong here?
 
The animations are all under the LOD you deleted, so when you deleted that LOD you deleted the animations as well.

Gavin
 
Also, depending on the grid size you use, it might be that the wheel is just removed because it is smaller than the grid size you are using.

In your last screenshot it seems all 3 LODs have almost the same amount of triangles and drawcalls. In that situation it doesn't make much sense to add them. The rule of thumb is that each LOD should have around 40% less triangles than the previous.
 
Thx guys, however te rest animations works (flaps, covers ect):



Id like to do AI from this bird and Id like to learn it how to do LODs.

gavinc said:
The animations are all under the LOD you deleted, so when you deleted that LOD you deleted the animations as well.

Gavin
Click to expand...

Can I do something with this? Unfortunately, if I do LOD100 (original) with GRID size change as LOD100 again, it doesn't save, so it always has to be a different LOD, and I have to delete the main one with higher part of trangles.

arno said:
Also, depending on the grid size you use, it might be that the wheel is just removed because it is smaller than the grid size you are using.

In your last screenshot it seems all 3 LODs have almost the same amount of triangles and drawcalls. In that situation it doesn't make much sense to add them. The rule of thumb is that each LOD should have around 40% less triangles than the previous.
Click to expand...

Thx, I know, it's just for exercise :). Thank you for any help what I can do here. I checked few other models and always I see the same result - no gear, so if I will find a solution for this one, I will solve it for all :). Btw. I used Grid size 0.1 only, if I did with 0.001 the same result - no wheels after deleting the first with 20k, so it's probably something different.

If someone wants to check whats going on in this converted model, here it is (free old Alphasim C141) https://www.sendspace.com/file/3g6g6e (1,8Mb).
 
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Hi,

I haven't used the LOD Creator on aircraft models a lot myself, I would have to check if all animations are preserved. I think the vertex cluster algorithm might ignore the animations. Let me check in the source code.

Edit: I just checked. I loaded an aircraft model and created a new LOD. It seems all animations, like gears, are maintained correctly.
 
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arno said:
Hi,

I haven't used the LOD Creator on aircraft models a lot myself, I would have to check if all animations are preserved. I think the vertex cluster algorithm might ignore the animations. Let me check in the source code.

Edit: I just checked. I loaded an aircraft model and created a new LOD. It seems all animations, like gears, are maintained correctly.
Click to expand...
Thx Arno, but the problem is that when I removed the first LOD wheels gone from the rest LOD also :/.
 
Why are you removing the first LOD? The point of LODs is to reduce the complexity of models when you are further away from them to improve performance. You still need the original LOD.

As for figuring out why the wheels are deleted go into the hierarchy editor and see where in the hierarchy the parts are attached.

Gavin
 
Let me double check if the wheels stay when I remove the LOD. I did see that they switch correctly between the different states when I switch the LODs.
 
gavinc said:
Why are you removing the first LOD? The point of LODs is to reduce the complexity of models when you are further away from them to improve performance. You still need the original LOD.

As for figuring out why the wheels are deleted go into the hierarchy editor and see where in the hierarchy the parts are attached.

Gavin
Click to expand...

Thx for answers. I think something is here because they are on the same tree in the hierarchy, maybe it's connected somehow, when I remove the top LOD from LoD Creator Tool from MCX?
I think 20k for AI its too big. With Grid size 0.15 less it still looks cool and it will be better optimalized, more FPS friendly. Not a big difference in the view, so here is the reason why I need this . LOD with worse quality



Example. LOD 100 - red, LOD 80 (new) - green.
The one option would be to separate the wheels and reconnect with each LOD again ... but this is a Sisyphean and annoying job :confused:.
Btw. Top model part has LOD100 only:

 
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Does the scenegraph node above the wheel modelparts also have a LOD value assigned?
 
I can reproduce the issue with wheels being removed here with a test model. So that seems to be a bug in MCX. I'll try to fix that.
 
Hi,

I have been able to fix this issue. So in the next development release it will be fixed.
 
The new development release is online now.
 
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