marmoset toolbag 2.04 emissive

oxblood

hey guys, I have been trying to get some emissive textures going with marmoset but they hardly glow, its just more of a bright color (if you know what I mean). Anyone got any ideas of how to get a decent emissive texture going? There must be a way.. I think I have seen it before once or twice.

oxblood

Bump

stevston89

If you want help you should post images of exactly whats happening and your maps. It's impossible to know if you are doing something wrong without that.

oxblood

ok this is an example, so I have the albedo map and where I want it to glow in the alpha map. But as you can see its not glowing its just a different colour, and when I change the glow colour it just changes the color of the whole mesh, any ideas? Its basically the same result when I try the "heat" option also.


image search

PyrZern

Change that Glow color under Intensity ?

oxblood

It just changes the color of the whole mesh. And even still it doesn't glow

almighty_gir

There are two things happening here that you need to be aware of.

1. in all engines, the emissive channel is used to define a surface, or part of a surface that does not receive any lighting information. what this means is that it is lit purely by the value of the pixel and is neither lit nor shadowed by any scene lights or ibl.

2. the way the "glow" look is achieved is with a bloom post process (usually), since the emissive pixels tend to be brighter than the surrounding shaded pixels, bloom picks them up quite easily.

toolbag2 currently doesn't have bloom, unless i'm mistaken. a workaround for this would be to take two screenshots of your mesh. one with the diffuse/spec/normals etc. and then a second with just the emissive map applied. overlay them in photoshop, blur the emissive screenshot (which should be all black except for the glowing areas) and set the layer to screen.

oxblood

Thanks almighty_gir That will definatly work as a good substitute until toolbag2 gets bloom. but yeh, heres the results.. not too bad.

free image upload

stevston89

Ok so you emmisive map should have falloff to it. I generally create a sharp mask then blur it a bit. Duplicate that and then blur it a lot. You need the gray areas to get the glow feel. Also heat maps work great if you need a hot iron or fire based look. Here is a quick example (keep in mind I made it in like 5 minutes):

stevston89

@ gir - There is bloom it under the camera settings in post effect. It will help, but you still need the fall off so that not everything is pure white or color.

Edit: Here is a screen with bloom:

oxblood

that makes a lot of sense stevston89. thanks for the advice man.

almighty_gir

I stand corrected! i really should know this stuff haha!

EarthQuake

Lol yeah Lee you should. As you guys have figured out, we do support bloom, but we don't as of yet support a bloom pass specifically for emmisive materials.

almighty_gir

that's what i was talking about............


.....hehe

Swizzle

One fun thing to note is that, with Toolbag's support for 32-bit textures, you can get some really awesome affects from bloom and emissive by taking advantage of the higher range of colors.



This is what the texture looks like crunched down to 8-bit, but it would look pretty much identical to this on your screen in Photoshop even in 32-bit mode: