3DsMax exporter wrong compression

[Pierre Glibert]

Hi community

After an export from 3dsmax to gltf, I saw that my metallic/roughness map is to much compressed in jpeg. That create bad artefact on my render.

Secondly, I saw that my color map switch from jpeg to png. I have no transparency, it's not necessary in my case. I prefer to keep a little compression for time loading reason. Is there a way to correct this ?

Is it possible to add an option like a checkbox "compress", on the exporter, to not compress or compress images ?

 

Thanks for your help.

Pierre.

[Guest]

Hello this is part of our backlog: https://github.com/BabylonJS/Exporters/issues/62 (And we are looking for help ;))

For you color map can you make sure that Alpha Source is set to none in 3dsmax?

[Pierre Glibert]

Thanks @Deltakosh

I added a comment on the issue : https://github.com/BabylonJS/Exporters/issues/62

[Guest]

Thanks!

[Pierre Glibert]

Hi @Deltakosh

In the meantime, is it possible to make a quick correction to correct the compression to 100% for keeping a good quality ? ( ex : metallic/roughness map is to much compressed )

Thanks in advance,

Pierre.

[Guest]

Pinging @noalak (But I guess it should be good)

[Pierre Glibert]

Hi @noalak 

Can you help me ?

On 4/23/2018 at 2:37 PM, Pierre Glibert said:

Hi @Deltakosh

In the meantime, is it possible to make a quick correction to correct the compression to 100% for keeping a good quality ? ( ex : metallic/roughness map is to much compressed )

Thanks in advance,

Pierre.

 

[noalak]

Hi @Pierre Glibert

I'm surprised compression quality is not 100% by default but i can definitly force that.

I've never experienced an over compression of a jpg by the exporter, can you provide me a simple sample scene in which you experience that to make sure the fix is correct?

[Pierre Glibert]

hi @noalak 

I will send you a test scene when it's ready

Thanks for your help.

[Florent Glibert]

Hi @noalak,

I created a test scene grouping together the majority of PBR maps in order to give an example of the issues we are encountering. You can find it in attachment.

 

Color map jpg to png

The color map is automatically converted to the png format after the export. The issue here is that our initial picture in jpg format (980 Ko) switched to the png format (1530 Ko). I already checked that my transparency channels are well deactivated in 3ds max.

Would it be possible to keep the standard picture as it is after the export ?

 

Transform jpg 72dpi to jpg 96dpi

I also noticed that the export converts the dpi of my jpg pictures. The latter change from 72dpi to 96dpi.

Would it be possible to keep the initial dpi while exporting ?

 

Low resolution metallic/roughness map

We noticed a loss of quality during the merge of the roughness map and the metallic map intended for the PBR.

Here is a more explicit example :

There is a kind of smoothing and artefacts in the central hole of the floor while the edges are sharp on my roughness or metallic maps. Is there an additional compression during the export ? If yes, can we deactivate it ?

 

We thank you very much in advance for your help and your time !

textureOptimisation.rar

[Pierre Glibert]

Hi @noalak 

My brother send you a test scene and some comments in previous post.

Can you help us ? Do you need something more ?

[noalak]

I'm on it! Available soon.

[noalak]

With 3ds max exporter v1.0.5,

• compression quality is set to 100%
• jpg base color without any transparency is copy / pasted to output. Thus no conversion to png + dpi unchanged.

Thanks for your feedbacks!

[Pierre Glibert]

@noalak thanks !