Author Topic: The new Corona Converter feedback thread  (Read 11022 times)

2021-07-07, 11:20:40
Reply #60

maru

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Open Archmodels vol. 251 on the Evermotion website download the free sample and be amazed how the scene works just fine and when you convert it, all goes to hell.
Also, I am not sure why I am even bothering writing about how you are gonna release V7 with a material library only half-converted and when using the converter on the other half the materials are broken with spaghetti mixes and look nothing like they should.

P.S. Also coronadistance refuses to get into any map slot if the converter was used on the material. Only solution is to create a new material with it.

Thank you, reproduced. I will log it for a review and hopefully we can improve similar cases. We would greatly appreciate providing examples like this when something is not working as expected.

2021-07-07, 12:08:53
Reply #61

marti_d

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Sorry If I sound aggressive but at this point, so much stuff just doesn't work It's hard to keep track. I am fortunate to be able to use the daily builds and not be in a company or a team but I can't imagine anyone will use the new release anytime soon if you don't take at least half a year more to work on things. It's fun and games to test out things but for some people, this is a livelihood. Also any comment on the material library, I think you can reproduce that quite easily.

Also are you in the talks with major texture providers such as Quixel, Poliigon. They both have plugins for importing textures and both don't work at the moment. Getting materials as pure glass or with 99 bump and so on.

2021-07-07, 20:12:11
Reply #62

selene

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Hey,

I intended to use the Corona Converter tool  mainly to convert Vray materials into Corona materials. But I always get a mess (so many unecessary nodes) and the result is not convincing. Eventually, I end up making the conversion manually which is very time consuming.

Did the corona team plan to make major improvements in this field ?

Thanks !

Hello mos2787, thank you very much for your feedback. Please do you use the latest Release Candidate of Corona 7? Over the last couple of "Release Candidate releases", we tried to address the issues you mention. Also, please could you provide us the scene in question?  We'd like to have a look at it and to try to improve Corona Converter accordingly.

2021-07-08, 02:25:42
Reply #63

kanyno

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some materials are converted with refraction at 1! For now the Rc has disappointed me. I hope the final version of Corona 7 is good.

2021-07-08, 10:37:09
Reply #64

romullus

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@kanyno, it would be much more useful if you could send a scene with offending materials to the team. https://corona-renderer.com/upload
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2021-07-08, 11:14:19
Reply #65

maru

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Also are you in the talks with major texture providers such as Quixel, Poliigon. They both have plugins for importing textures and both don't work at the moment. Getting materials as pure glass or with 99 bump and so on.

We are in touch with them and reporting such issues regularly. I think the 99 bump issue is already fixed on their side and this should be available in the newest version of the exporter, or at least it is being worked on.

As to your previous report about the Archmodels 251 scene:

1) The appearance of the material changes (some features of the material become invisible):
For example, the cracks are becoming invisible - this is because they are fully refractive in the original material.
Please understand that if the original material was constructed in a highly un-physical / fake manner, then it may not be possible to recreate it with the Physical Material. The converter tries to keep similar appearance, but that is not always possible.
In this case it seems like keeping the Legacy Mtl may be the best solution.


2) Generating Mix nodes on top of Mix nodes:
This is actually related to point 1. The converter tries to keep similar appearance, and since the material is set up in a "tricky" way (using diffuse color, reflection map, glossiness map, IOR map, opacity map,....) for a simple asphalt material, it becomes problematic.

I am afraid this may be a case of "the converter cannot fix what was originally broken".

But still, we have this logged and will see if there is a way to keep better appearance and simpler shader networks (can't promise anything though).


2021-07-08, 12:51:28
Reply #66

selene

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some materials are converted with refraction at 1! For now the Rc has disappointed me. I hope the final version of Corona 7 is good.

Hello kanyno, thank you very much for your feedback. If the original materials do not use refraction and the converted materials become refractive, this is indeed a problem, but as romullus already mentioned, we are not able to fix this issue unless we have the scene available. Please, would you be so kind and send us the scene in question? We'd like to have a look at it and to try to fix / improve Corona Converter accordingly.

2021-07-09, 15:38:41
Reply #67

dumbrava.traian

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Does anyone have problems with Forest pack and Corona 7 RC 5? when i try with corona-7-3dsmax-daily-2021-06-03 work good but with Corona 7 RC 5 i think with the new converter desen't even start the render if i have a forestpack obj on the scene

2021-07-09, 16:54:11
Reply #68

rowmanns

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Does anyone have problems with Forest pack and Corona 7 RC 5? when i try with corona-7-3dsmax-daily-2021-06-03 work good but with Corona 7 RC 5 i think with the new converter desen't even start the render if i have a forestpack obj on the scene
Hi,

Pleas only post your questions in one place on the forum. I have replied to you in the daily builds thread.

Rowan
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2021-07-14, 16:23:55
Reply #69

Kris H

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We are losing (3dsmax) Material Id Chanel after conversion. Corona Legacy Mtl with id channel = 1 always converted with mtl ID channel = 0. So I lost my mtl channels in materials for postproduction in my scene.
Corona G-Buffer ID override works fine.
Fixed in RC6 :)

2021-07-14, 16:24:17
Reply #70

Kris H

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Convert by class in corona converter v1.45 does not convert 3Ds Max Physical Material (compile error: Unexpected end-of-script).

I am still on Corona 6 hotfix 2 in 3Ds Max 2022, has this already been fixed, or is this a known bug?
Fixed in RC6 :)

2021-07-14, 22:48:08
Reply #71

selene

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Hi

RC5

Again the same tree test. Thanks, this time render result is closer to original, but the shader structure is still messy. Sorry, but I can't see the logic in this Mix map chaos, even simple opacity map from original material became two mix maps (original bitmap + CoronaColor?) plugged in to Front/Back map. Actually all simple bitmaps are converted to Mix maps - original bitmap + CoronaColor with no affect of CoronaColor map in those mixes... This structure is very difficult to handle which makes it not usable for further adjustments. It's easier to remake the shader manually from original material, than to handle this mess.

The test scene was uploaded some time ago - 1624024326_converter7-vray-comparison.zip

Hello Bormax, we tried to make some changes in the Corona Converter code to create simpler shading networks when converting VRay2SidedMtl. These changes are included in Corona Converter which is shipping with Corona Renderer 7 RC6. Please let us know whether the shading networks created during conversion now look as expected or whether there is still some room for improvement.

2021-07-15, 10:45:09
Reply #72

Skalpel3d

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The RC 6 version of the converter constantly badly detects metal / non-metal materials when converting, Very annoying situation, e.g. in the case of many objects, such as books .Link to the scene after converting, original vray materials in the editor  https://drive.google.com/file/d/1QV2Bx3_FdbIcoBxPBFkn4r9vbNAEY-mY/view?usp=sharing

2021-07-16, 10:41:01
Reply #73

tallbox

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The RC 6 version of the converter constantly badly detects metal / non-metal materials when converting, Very annoying situation, e.g. in the case of many objects, such as books .Link to the scene after converting, original vray materials in the editor  https://drive.google.com/file/d/1QV2Bx3_FdbIcoBxPBFkn4r9vbNAEY-mY/view?usp=sharing
I can confirm that. I have decided to test the daily onto a real-life working scene with many trees and guess what - all leaves went as metal.
Until further solution to this, I've decided to use one of the old converters and it's been working fine.
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2021-07-16, 11:52:15
Reply #74

rowmanns

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The RC 6 version of the converter constantly badly detects metal / non-metal materials when converting, Very annoying situation, e.g. in the case of many objects, such as books .Link to the scene after converting, original vray materials in the editor  https://drive.google.com/file/d/1QV2Bx3_FdbIcoBxPBFkn4r9vbNAEY-mY/view?usp=sharing
Hi,

Could you please send over a scene saved before the conversion has taken place? It's a little difficult to figure out what went wrong if we can't see the original materials.

Thanks,

Rowan
Please read this before reporting bugs:
How to report issues to us!