Broken cube maps on Maya 2018 and Shaderfx

[brurpo]

Hi there!

Cube maps generated with Lys at all combination of header/compression are broken in maya 2018 while operating in openGL using ShaderFX. They are working on previous versions of maya.

For some reason the pixels are out of order in maya 2018, instead of RGBA, its ARGB, and they are not properly being sampled.

Tested in 3 different computers.

Thanks for your time!

[sean.heasley]

Hi @brurpo

Thanks for reporting this!

When you get a chance, can you please post a video of this happening on your machine? I'd like to add it to my log with our dev team so they have an easy time reproducing and working on a fix for this!

If you need a video capturing program, Screencast is a great option that we use here at Autodesk

[brurpo]

Hi Sean! Thanks as always!
Sure! I will do it as soon as possible.

[sean.heasley]

Hi @brurpo

Just wanted to check in to see how things were going. Any changes with this issue?

If your issue is resolved, please click Accept as Solution on the posts that helped you so others in the community can find them easily.

[brurpo]

Hi @sean.heasley, sorry for the delay, here is the video showing whats wrong.

This only happens in openGL.

Thanks a lot for your time!

https://vimeo.com/271542069/c11086fb98

[sean.heasley]

Hi @brurpo

Thanks a ton for that in depth video with reproduce able steps!

I went ahead and forwarded this along to our dev team so they can start working on a fix!

Please let me know if there's anything else I can do to assist you!

[brurpo]

Thanks a lot! 

Let me know if you need any additional info, my shader or the cube map I am using.

Please, if possible, keep me posted on any news 😉

[sean.heasley]

Hi @brurpo

Sure thing!

I linked this forum post in the report so our devs can watch the video you provided and if they need any more info they'll let me know 

[brurpo]

Just wanted to leave an update.

Exporting as 8_8_8_8 compression solves both color and sampling problems.

And if I export it as 16float the green channel is the one swizzled with the alpha channel. Yeah very crazy.

So it seems that the problem is with HDR values or the way maya is decoding HDR cubemaps.

Too bad I need HDR cubes =(

[sean.heasley]

Hi @brurpo

Thanks for the update!

This sounds vaguely familiar to an issue so I saw about a year ago with HDR in Maya but sadly I can't remember if it was the same as this or a different issue entirely.

Either way, this information should help the devs narrow your issue down!

[brurpo]

Just another info.

The problem happens with any HDR .dds, not just cubemaps.

Best Regards!