[Bf-gamedev] PBR Workflow

[Mike Erwin]

By "current GLSL node system" do you mean viewport preview of Cycles/BI
materials in today's Blender? Or does BGE have some real-time magic I'm not
aware of?

GLSL text as output could be consumed by some engines, and will be really
helpful when debugging our own code gen! UE4 materials use HLSL under the
hood so exporting nodes instead of shader text makes more sense there --
they can generate their own text.

Mike Erwin
musician, naturalist, pixel pusher, hacker extraordinaire

On Wed, Nov 18, 2015 at 4:32 PM, Jacob Merrill <blueprintrandom1 at gmail.com>
wrote:

> Can the current glsl node system be used to make a corrected pbr
> template?(temporary fix?)
>
> can glsl node scripts then be output as a glsl script somehow for ue4,
> godot, unity5 etc?
> On Nov 18, 2015 1:15 PM, "Mike Erwin" <significant.bit at gmail.com> wrote:
>
>> 2) someone else will have to chime in about color space stuff. Reflection
>> probes will be needed, maybe call that 2b for this conversation. Simpler 2a
>> would be image-based lighting from a single global source. Fake it til we
>> make it. Or til we can fake it better, since we're talking reflection
>> probes and not ray tracing.
>>
>> 3) glTF perhaps? Blender could export the node tree as long as the set of
>> supported nodes on the other end (game engine) are known. Or combine those
>> into text-based GLSL, which glTF can handle.
>>
>> Mike Erwin
>> musician, naturalist, pixel pusher, hacker extraordinaire
>>
>> On Wed, Nov 18, 2015 at 9:46 AM, Juan Linietsky <reduzio at gmail.com>
>> wrote:
>>
>>> Mike, this is great news. We are going to add PBR in Godot soon too, so
>>> having a proper workflow for exporting this (and not only to Unreal) would
>>> be desired.
>>> Regarding your points:
>>>
>>> 1) We have a node based and text based shader support, so something like
>>> this would be pretty useful.
>>> 2) I think this is more tricky than that, because nowadays modern game
>>> engines all render in linear colorspace and later do tonemapping and gama
>>> correction. Textures would need to be converted to linear (if they aren't
>>> already). Also, we should be able to set global viewport/camera reflection
>>> probes?
>>> 3) This may be troublesome because neither Collada nor FBX support this
>>> as far as I know. I can make my own exporter easily, but we have no
>>> standard. Do you have anything in mind?
>>>
>>> Cheers
>>>
>>> Juan
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Fri, Nov 13, 2015 at 6:58 PM, Mike Erwin <significant.bit at gmail.com>
>>> wrote:
>>>
>>>> Hi guys,
>>>>
>>>> Yes this is one of the (preliminary) targets for Blender 2.8! Several
>>>> people at this year's conference expressed interest in a better Blender -->
>>>> Unreal pipeline. Especially for materials. I just started talking to some
>>>> folks at Epic and hope to work closely with them and Blenderheads alike.
>>>>
>>>> The big parts:
>>>> 1) nodal GLSL material system that feeds into a PBR combiner node
>>>> 2) updated viewport that renders #1
>>>> 3) export rich materials from Blender, import into Unreal Engine with
>>>> no quality loss
>>>>
>>>> If any parts of these are already available please point them out!
>>>>
>>>> Unreal isn't the only possible target, just the one I'm most interested
>>>> in & seems to have wider interest in the community.
>>>>
>>>> Mike Erwin
>>>> musician, naturalist, pixel pusher, hacker extraordinaire
>>>>
>>>> On Fri, Nov 13, 2015 at 4:24 PM, Jacob Merrill <
>>>> blueprintrandom1 at gmail.com> wrote:
>>>>
>>>>> We really could use a pbr viewport render, and then implement it in
>>>>> the game engine as well. But alas, I am but a lowly python scripter.
>>>>> On Nov 13, 2015 1:06 PM, "Juan Linietsky" <reduzio at gmail.com> wrote:
>>>>>
>>>>>> Hi guys, just a question. I'm pretty sure that Unreal users have
>>>>>> asked this a lot. Is there anything planned on the way of doing a PBR
>>>>>> worfklow? (more in the vein of Substance Painter). Game engines are almost
>>>>>> standardized on that nowadays so going from them to blender and using PBR
>>>>>> is kind of difficult..
>>>>>>
>>>>>>
>>>>>> Juan
>>>>>>
>>>>>>
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