topic Re: How to make doubleside? in Stingray Forum (Read Only)

How to make doubleside?

Anonymous — Sat, 07 Nov 2015 15:02:46 GMT

I bring 3ds max modeling to stingray, but I can’t see backside, regarding this is there any other way to make doubleside?

Re: How to make doubleside?

Anonymous — Sun, 08 Nov 2015 04:18:44 GMT

You need to set your material to not use backface culling.

Here's a sphere with some faces removed. We can't see the backfacing faces, bcause backface culling is enabled for the default material's shader. Let's create a unique copy of the default material's shader so that we can disable backface culling.

Select the material you want to change and then click the "Make Unique" button in the Property Editor. This creates a copy of the shader graph of the material from the core Stingray library, instead of just using a short/reference to it. Now that we have our own copy of it in our project, we can edit it.

The "Make Unique" button is now replaced by a "Open Shader Graph" button. Click it, and a shader editor node graph window will open.

We actually don't need to edit any nodes. We just need to change a single setting. Click on the "Standard Base" node (labeled with a 1) to select it, and then in the Property Editor, change the "Face Culling" option from "Back" to "None (double sided)".

Close the material editor. Now you should be able to see the back faces of your mesh.

Note that you may or may not see some odd results with shadows and surface normals on the backfacing polygons. I'm not an expert on Stingray so I can't tell you specifically how to fix that. It might not be a big deal for your use case. If it is, maybe someone else can offer suggestions. You could also consider duplicating the facebacking polyons in 3ds Max, flipping them, and then using the "Push" modifier with a small value to give your mesh a surface for both sides where you need it (hood, certain body panels, etc.)

Re: How to make doubleside?

fpmalard — Fri, 20 Nov 2015 13:30:58 GMT

Hello,

It seems all imported materials has a default Shader Import material set as their Parent material.

In a project you want all imported materials to be always 2-sided it would be tedious to repeat this procedure on every imported material coming from different sources like FBX.

If you select any imported material it will point to the following folder as its Parent material location:

C:\Program Files\Autodesk\Stingray\1.0.31.0\core\stingray_renderer\shader_import

There, you will find the file "standard.material" which contains all inherited default properties.

So, is there a way to change this template so all imported material get automatically se to "Face culling = none" ?

Regards,

Re: How to make doubleside?

dan.matlack — Fri, 20 Nov 2015 18:56:03 GMT

You have a couple options.

One: you can use DXShaders for Stingray in Max and Maya and set up your material properly for double-sided and then they will import correctly.

Two: you can change the default on the base standard shader node. That is located here: core\stingray_renderer\output_nodes\standard_base.shader_node

Defined here:

render_state = {
	culling_base = {
		inherit: ["core/stingray_renderer/shader_libraries/common#default"]
		state: {
			"defined(CULL_NONE)" = {
				cull_mode = "cull_none"
			}
			"defined(CULL_FRONT)" = {
				cull_mode = "cull_ccw"
			}
			"!defined(CULL_NONE) && !defined(CULL_FRONT)" = {
				cull_mode = "cull_cw"
			}
		}
	}

And then set here(where you will change to what you want all to be):

	material_transfer = {
		inherit: ["core/stingray_renderer/shader_libraries/common#default"]
		state: {
			cull_mode = "cull_none"
			z_write_enable = "false"
			z_enable = "false"
		}

Re: How to make doubleside?

fpmalard — Mon, 23 Nov 2015 14:06:20 GMT

I see, but the default "cull_mode" is already "cull_none".

Shouldn't it be setting as 2-sided materials then?

I'm importing a FBX with embedded materials by the way.

Further, all imported materials require you to click "Make Unique" to expose the "cull_mode" property which is not "cull_none" by default as I was assuming by the file settings you have shown (and I verified here).

Am I missing something?

Thanks.

Re: How to make doubleside?

dan.matlack — Mon, 23 Nov 2015 18:19:30 GMT

The defaul is set here:

	{
		type = "drop_down"
		display_name = "Face Culling"
		options = {
			"Back"					= "00000000-0000-0000-0000-000000000000"
			"Front"					= "c198c109-2cdf-49ee-af18-a982c23e2729"
			"None (double sided)"	= "8df1b8f7-17c2-4ae4-8c4e-25517ec1df46"
		}
		default = "00000000-0000-0000-0000-000000000000"
	}

Currently set to 'Back'.

You can change that to double sided. This is in standard_base.shader_node.

Re: How to make doubleside?

fpmalard — Mon, 23 Nov 2015 18:51:05 GMT

Ok, it did work...but...

I still have to select materials individually and hit "Make Unique".

Any other way to do it without having to even touch the materials?

Maybe a script?

Thanks.

Re: How to make doubleside?

dan.matlack — Mon, 23 Nov 2015 19:25:56 GMT

If you set your base to be double sided in the script file, you do not have to do anything else. Just recompile your materials or reopen the project. All materials with the standard base would be double sided by default at that point. No need to reopen and set.

Re: How to make doubleside?

Anonymous — Mon, 06 Mar 2017 15:23:45 GMT

Hello,

I've followed all the steps that you mentioned above and changed the Standard Base material to be Face Culling=None (Double Sided) in the script file.

default = "8df1b8f7-17c2-4ae4-8c4e-25517ec1df46"

All materials are Double Sided now but in the viewport does not appear to be so.

As a test, I've created a simple box with wrong normals and imported it into Stingray; as you can see in the screenshot, Face Culling is set to None (Double Sided) automatically from the script but in the viewport, it doesn't seem like it.

I still need to click Make Unique on every each material, and though Face Culling is already set to None (Double Sided), I still need to reselect it for the material to actually be Double Sided and appear correctly in the viewport as shown in the screenshot.

Am I missing something here or are there any solutions to this?

Thanks.