Hi,
First things first: Corona is awesome :).
Feature request: It would be great to be able to setup bump with real world scale values. Something like Vraycolor2bump map.
Best,
Tomasz
Sorry for bumping this old topic, but i really hope that bump mapping will get some improvement sometime after Corona v1.0 release. To be able to combine several procedural maps in bump slot instead of baking everything into bitmap, would be so much convenient.
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additional note: if we do own bump node, perhaps we should use it to fix gamma for 3ds max: https://forum.corona-renderer.com/index.php?topic=13016
Would you mind to change if to when? Pretty please :]
Pavel is working on this right now 
done