#6081: Evaluate the diffuse stage registers once before checking the …

…alpha test value
codereader · Sep 4, 2022 · 263514a · 263514a
1 parent 9656683
commit 263514a
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/radiantcore/rendersystem/backend/OpenGLShader.cpp b/radiantcore/rendersystem/backend/OpenGLShader.cpp
@@ -518,6 +518,12 @@ void OpenGLShader::constructEditorPreviewPassFromMaterial()
     // settings like scale and translate
     previewPass.stage0 = findFirstLayerOfType(_material, IShaderLayer::DIFFUSE);
 
+    // Evaluate the expressions of the diffuse stage once to be able to get a meaningful alphatest value
+    if (previewPass.stage0)
+    {
+        previewPass.stage0->evaluateExpressions(0);
+    }
+
     previewPass.setRenderFlag(RENDER_FILL);
     previewPass.setRenderFlag(RENDER_TEXTURE_2D);
     previewPass.setRenderFlag(RENDER_DEPTHTEST);