How to render to 32bit (transparent background)?

[Pheidian]

Newbie Question, How do I render images so that the output files have transparent background (for sky composition etc)?

[Pheidian]

One more question under this same post topic. What does mean "Physically incorrect light model in scene with global illumination"?

I get that message in the console every time I render my scene...

[Haven1000]

What does mean "Physically incorrect light model in scene with global illumination"?.

If you have Ambient light set >0 or any lights not set to ^2 Kray will return this message.

This does not change the functionality of kray, just a warning that the lighting in your scene is "less" physically correct.

How do I render images so that the output files have transparent background (for sky composition etc)?

For an Alpha channel place the command "needbuffers 3;" in the header.