Asset Creation Pipeline: Difference between revisions
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===Off Grid Materials === | ===Off Grid Materials === | ||
'''Names of possible materials in engine''' | |||
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In cases where a mesh is one sided but can we seen from either side such as plant leaves or paper, use the two sided version of the above shaders. The naming convention simply adds the post fix “-2sided”. | |||
For example, paper would use Diffuse-Vertex-2sided and two sided glass would use Glass-Vertex-2sided | |||
[[File:Material example.png|400px|thumb|left]] | |||
==Preparing To Export == | ==Preparing To Export == |
Revision as of 11:07, 20 September 2017
Creating Your First 3D Model
Pre-requisites
First off you will need a 3D modelling program, for this example we will be using Blender which is the recommended tool for creating assets for Off Grid
Setting Up Blender
Before we start creating 3D assets we need to set blender up properly. To start we will change Blenders rendering engine to Cycles Render. This can be seen in fig 0.1
Now that we have the correct render engine selected we must insure that blender is set to the correct units. A single Unity3D Unit is 1m, therefore we must set our unit preset to meters within Blender.This can be done by selecting scene properties and then selecting the drop down box under the units section. This can be seen in fig 0.2
Once you have done that we just have to clean up our scene by removing the camera and the lamp. This can simply be done by right clicking them in the hierarchy and selecting delete.
Naming Conventions
Now that you have properly set up Blender you are free to create your 3D asset. An Important note while creating your asset is to insure that your 3D Asset follows Off Grids naming conventions:
- All asset names should use UpperCamelCase and end with the appropriate number scheme _01, _02, _03
- If an asset is completely specific to a location, for example a sign for a company building then the format to follow would be:
ObjectName-ObjectLocation_0X
E.G - CompanySign-Bank_01
- If there are multiple variants of the asset and you feel that the asset needs further description then you should use the following format:
ObjectName-Adjective-ObjectLocation_0X
or
ObjectName-Adjective_0X
E.G CompanySign-Big-Bank_01, CompanySign-Small-Bank_01, Fence-Mesh_01, Fence-Wooden_01
- All mesh objects in Blender or your 3D application of choice should use the postfix _mesh
E.G CompanySign-Big-Bank_01_mesh, Fence-Mesh_01_mesh
Example of the correct hierarchy in Blender:
Mesh Cleanup
Now that you have created your asset it is important to clean up any unnecessary Tris and insure the normals are facing outwards. Important - Your asset should not exceed max 150 tris for an average model (dependant on scale of object)
To check the Tris count of your asset all you need to do is select your asset and look at the top bar as shown in fig 0.4
Normals
To check the normals of an asset while in the perspective window you must press N which will open a new panel scroll to the bottom of the panel until you find the Shading section. Once at the shading section toggle Backface Culling as shown in fig 0.5
Now that this option has been selected you may find parts of your asset are invisible like the cube on the left shown in fig 0.5, this is because the normals of the object are facing the incorrect way. To fix this you must flip the normals.To fix the normals you must be in edit mode and preferably in face selection mode. Now select the faces that need fixing.Navigate to the left panel shown in fig 0.6 if this is missing for you make sure you select the perspective window and press T. Select the Shading/UVs tab and click the button Flip Direction as shown in fig 0.6
Vertex Painting
Now we need to add some colour to our asset. To do this we use Vertex painting. To apply vertex paint to your asset all you need to do is select Vertex paint from the interaction mode drop-down box as shown in fig 0.7
To start painting your model just select the white bar below the colour wheel.(In fig 0.7 this bar is green) which will then bring up a new window as seen in fig 0.8
Here you can select any colour you wish using the colour wheel or you can select the Hex button to use hex codes to find a specific colour. Using the hex codes in the table below will allow you to match colours used within Off Grid.
Vertex Colours(base)
Hex code | Preview | Description |
---|---|---|
#FFFBF0 | white walls etc. | |
#CCCCCC | Concrete, grey floors | |
#F0FAFF | window glass | |
#FFF7E8 | incandescent lights |
Vertex Colours(Other)
Hex code | Preview | Description |
---|---|---|
#4E4B4B | Tarmac | |
#82817E | Paving | |
#ADB2BD | Aluminium | |
#8393B0 | Pale Painted Blue | |
#232426 | Bakelite Black Plastic | |
#414540 | Hangar Roof Runners dark Plastic | |
#c6c6b2 | Painted Metal (white) | |
#e9f0ff | White Plastic | |
#FFF142 | Yellow Paint | |
#2E221B | Electric Cables | |
#5E4D2E | Rope | |
#D41414 | Red Valves | |
#196EB4 | Blue Painted (waterworks machines/pumps) | |
#BD5C2E | LightWood1 - use for stairways (wooden) | |
#8B4627 | DarkWood1 - mainly used for all woods | |
#753A1A | MediumWood | |
#53260F | DarkMahogany - Use for handrails (wooden) | |
#A97537 | Brass (Metal) | |
#3E752C | GreenFelt - Use for carpet / stairway carpet initially | |
#BD9364 | Cardboard | |
#9FADAC | ShrinkWrap / Light or thin plastic | |
#e01616 | Container - Red | |
#842404 | Container - Burgundy | |
#fc921a | Container - Orange | |
#fff32c | Container - Yellow | |
#26381d | Container - Dark Green | |
#10b930 | Container - Green | |
#2888c7 | Container - Blue | |
#97d2ec | Container - LightBlue | |
#173e5d | Container -DarkBlue | |
#f2edd8 | Container - Cream | |
#c0c2d3 | Container - Grey | |
#eeedd | Devices white Plastic | |
#f1ab10 | Buttons Orange | |
#2E271B | Buttons Dark Grey | |
#eb492e | Buttons Red/Orange | |
#D14535 | Buttons Pink | |
#29241e | Screen Dark Grey | |
#3c7e3b | Screen Green tone | |
#3b7e9f | Screen Blue tone | |
#6F7069 | Rails-Track for Mobile Cranes | |
#705C32 | Rail-Track Sleeper (wood) | |
#C26400 | Fork Truck / Main orange for Harbour Vehicles | |
#423D3D | Rubber for Wheels etc | |
#C7B19F | Lamp Shade | |
#D6B08D | Beech wood |
Off Grid Materials
Names of possible materials in engine
Material name | Description | Has 2 sided |
---|---|---|
Diffuse-Vertex | Simple diffuse shader | Yes |
Specular-Vertex | Specular reflections (Mainly used for plastic) | Yes |
Metallic-Vertex | Specular reflections for metal | Yes |
Glass-Vertex | Transparent + Specular for glass | Yes |
Illuminated-Vertex | Objects that illuminate such as screens and lights | Yes |
ScriptControlledLamp | Screens, Lamps, etc that have their color & emission controlled by code. | No |
In cases where a mesh is one sided but can we seen from either side such as plant leaves or paper, use the two sided version of the above shaders. The naming convention simply adds the post fix “-2sided”.
For example, paper would use Diffuse-Vertex-2sided and two sided glass would use Glass-Vertex-2sided
Preparing To Export
Before you export your asset, it is important to ensure that you perform the following checks:
- Check that the scale is correct – This can be done by selecting the object and pressing N, which will allow you to verify that the scale is 1.0,1.0,1.0
- Check that the pivot is set to the correct place. The default place for setting your pivot should be the centre of the object unless the object is being placed on the ground in which case it would be Bottom centre.
- Check that edges are set to hard/sharp
- Check naming conventions are correct. See naming conventions
- Check Export Settings are correct – see fig 0.7
Importing Your Model
To import into Unity, you can drag and drop your FBX file into the appropriate folder. Once you have the asset in Unity it is important to check the import settings of your asset. To ensure your model displays correctly within unity make sure that:
- Material Naming is set to From Models material
- Material Search is set to Project-wide
Once set, your asset should display with the correct colours and materials that you have set in Blender.