Added support for point sampling and affine texturing to the custom Quake shader, both of which can be enabled/disabled through the visual style. Also changes all of the keywords into multi_compile, so they aren't stripped during builds (all of these are controlled through code).

Assets/Scripts/Game/GameAssets.cs

@@ -66,7 +66,7 @@ public class GameAssets
     {
         if (!lightmaps.TryGetValue(lightmapNum, out var lightmap))
         {
-            lightmap = new Texture2D(width, height, TextureFormat.RGBA32, false) { name = $"Lightmap_{lightmapNum}" };
+            lightmap = new Texture2D(width, height, TextureFormat.RGBA32, false) { name = $"Lightmap_{lightmapNum}", wrapMode = TextureWrapMode.Clamp };
             lightmaps.Add(lightmapNum, lightmap);
         }
 

Assets/Scripts/UniQuake.cs

@@ -211,6 +211,7 @@ public partial class UniQuake: MonoBehaviour
         if (CurrentStyle == null)
         {
             CurrentStyle = style;
+            CurrentStyle.Activate();
             return;
         }
 

Assets/Scripts/VisualStyle.cs

@@ -15,6 +15,12 @@ public class VisualStyle : ScriptableObject
     [SerializeField]
     protected Material liquidMaterial;
 
+    [SerializeField]
+    protected bool pointSampling;
+    
+    [SerializeField]
+    protected bool affineTexturing;
+
     [SerializeField] 
     protected LiquidProperties liquidProperties = new LiquidProperties();
 
@@ -22,6 +28,14 @@ public class VisualStyle : ScriptableObject
     protected ParticleSystems particles = new ParticleSystems();
     public ParticleSystems Particles => particles;
 
+    public virtual void Activate()
+    {
+        if (pointSampling)
+            Shader.EnableKeyword("_POINT_SAMPLING");
+        else
+            Shader.DisableKeyword("_POINT_SAMPLING");
+    }
+    
     public virtual Material CreateEntityMaterial()
     {
         return new Material(entityMaterial);
@@ -86,6 +100,11 @@ public class VisualStyle : ScriptableObject
             material.EnableKeyword("_EMISSION");
         else
             material.DisableKeyword("_EMISSION");
+        
+        if (affineTexturing)
+            material.EnableKeyword("_AFFINE_ON");
+        else
+            material.DisableKeyword("_AFFINE_ON");
     }
 
     public virtual void SetWorldTextures(Material material, Texture2D mainTexture, Texture2D fullBright, Texture2D lightmap)
@@ -105,6 +124,10 @@ public class VisualStyle : ScriptableObject
             material.SetTexture("_LightMap", lightmap);
             material.EnableKeyword("_QLIGHTMAP_ON");
         }
+        else
+        {
+            material.DisableKeyword("_QLIGHTMAP_ON");
+        }
     }
 }
 

Assets/Shaders/Quake.shader

@@ -44,13 +44,14 @@ Shader "UniQuake/Quake"
 
             // -------------------------------------
             // Material Keywords
-            #pragma shader_feature_local_fragment _ALPHATEST_ON
-            #pragma shader_feature_local_fragment _EMISSION
-            #pragma shader_feature_local _QLIGHTMAP_ON
+            #pragma multi_compile_local __ _ALPHATEST_ON
+            #pragma multi_compile_local __ _EMISSION
+            #pragma multi_compile_local __ _QLIGHTMAP_ON _AFFINE_ON    // Lightmapping and affine texturing are mutually exclusive 
 
             // -------------------------------------
             // Universal Pipeline keywords
             #pragma multi_compile _ _ADDITIONAL_LIGHTS_VERTEX _ADDITIONAL_LIGHTS
+            #pragma multi_compile _ _POINT_SAMPLING
 
             // -------------------------------------
             // Unity defined keywords
@@ -83,7 +84,7 @@ Shader "UniQuake/Quake"
 
             // -------------------------------------
             // Material Keywords
-            #pragma shader_feature_local_fragment _ALPHATEST_ON
+            #pragma multi_compile_local __ _ALPHATEST_ON
 
             #include "QuakeInput.hlsl"
             #include "Packages/com.unity.render-pipelines.universal/Shaders/DepthOnlyPass.hlsl"
@@ -108,7 +109,7 @@ Shader "UniQuake/Quake"
 
             // -------------------------------------
             // Material Keywords
-            #pragma shader_feature_local_fragment _ALPHATEST_ON
+            #pragma multi_compile_local __ _ALPHATEST_ON
 
             #include "QuakeInput.hlsl"
             #include "Packages/com.unity.render-pipelines.universal/Shaders/DepthNormalsPass.hlsl"

Assets/Shaders/QuakeForwardPass.hlsl

@@ -17,7 +17,11 @@ struct Attributes
 
 struct Varyings
 {
+#ifdef _AFFINE_ON
+    noperspective 
+#endif
     float2 uv                       : TEXCOORD0;
+    
 #ifdef _QLIGHTMAP_ON
     float2 lightmapUV               : TEXCOORD1;
 #else
@@ -104,8 +108,15 @@ half4 LitPassFragmentSimple(Varyings input) : SV_Target
     UNITY_SETUP_INSTANCE_ID(input);
     UNITY_SETUP_STEREO_EYE_INDEX_POST_VERTEX(input);
 
-    float2 uv = input.uv;
-    half4 diffuseAlpha = SampleAlbedoAlpha(uv, TEXTURE2D_ARGS(_BaseMap, sampler_BaseMap));
+    float2 uv = input.uv.xy;
+    half4 diffuseAlpha = SampleAlbedoAlpha(uv,
+        #if _POINT_SAMPLING
+        TEXTURE2D_ARGS(_BaseMap, point_repeat_sampler_BaseMap)
+        #else
+        TEXTURE2D_ARGS(_BaseMap, sampler_BaseMap)
+        #endif
+    );
+    
     half3 diffuse = diffuseAlpha.rgb * _BaseColor.rgb;
 
     half alpha = diffuseAlpha.a * _BaseColor.a;
@@ -126,7 +137,13 @@ half4 LitPassFragmentSimple(Varyings input) : SV_Target
 #endif
 
 #ifdef _EMISSION
-    finalColor += SampleEmission(uv, _EmissionColor.rgb, TEXTURE2D_ARGS(_EmissionMap, sampler_EmissionMap));
+    finalColor += SampleEmission(uv, _EmissionColor.rgb,
+        #if _POINT_SAMPLING
+        TEXTURE2D_ARGS(_EmissionMap, point_repeat_sampler_EmissionMap)
+        #else
+        TEXTURE2D_ARGS(_EmissionMap, sampler_EmissionMap)
+        #endif
+    );
 #endif
 
     half4 color = half4(finalColor, alpha);

Assets/Shaders/QuakeInput.hlsl

@@ -27,6 +27,8 @@ CBUFFER_END
     #define _Surface            UNITY_ACCESS_DOTS_INSTANCED_PROP_FROM_MACRO(float  , Metadata__Surface)
 #endif
 
+                                 SAMPLER(point_repeat_sampler_BaseMap);
+                                 SAMPLER(point_repeat_sampler_EmissionMap);
 TEXTURE2D(_LightMap);            SAMPLER(sampler_LightMap);
 
 inline void InitializeSimpleLitSurfaceData(float2 uv, out SurfaceData outSurfaceData)

Assets/Styles/GLQuake/GLQuake.asset

@@ -15,10 +15,12 @@ MonoBehaviour:
   entityMaterial: {fileID: 2100000, guid: 4d7703ac1adf3534f89b4041b779ff5e, type: 2}
   worldMaterial: {fileID: 2100000, guid: fcbaf32c00bea2344bbb1419c61364b6, type: 2}
   liquidMaterial: {fileID: 2100000, guid: cd59502a1689c0847a1963c60e347987, type: 2}
+  pointSampling: 0
+  affineTexturing: 0
   liquidProperties:
     waterAlpha: 0.8
     slimeAlpha: 0.85
     lavaAlpha: 0.9
-    teleporterAlpha: 1
+    teleAlpha: 1
   particles:
     explosion: {fileID: 0}