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    <p>If you were to multiply your light texture with the scene, you will <em>darken</em> the area, not brighten it.</p> <p>You could try rendering with additive blending; this won't quite look right, but is easy and may be acceptable. You will have to draw your light with a fairly low alpha for the light texture to not just over saturate that part of the image. </p> <p>Another, more complicated, way of doing lighting is to draw all of your light textures (for all the lights in the scene) additively onto a second render target, and then multiply this texture with your scene. This should give much more realistic lighting, but has a larger performance overhead and is more complex.</p> <p>Initialisation:</p> <pre><code>RenderTarget2D lightBuffer = new RenderTarget2D(graphicsDevice, screenWidth, screenHeight, 1, SurfaceFormat.Color); Color ambientLight = new Color(0.3f, 0.3f, 0.3f, 1.0f); </code></pre> <p>Draw:</p> <pre><code>// set the render target and clear it to the ambient lighting graphicsDevice.SetRenderTarget(0, lightBuffer); graphicsDevice.Clear(ambientLight) // additively draw all of the lights onto this texture. The lights can be coloured etc. spriteBatch.Begin(SpriteBlendMode.Additive); foreach (light in lights) spriteBatch.Draw(lightFadeOffTexture, light.Area, light.Color); spriteBatch.End(); // change render target back to the back buffer, so we are back to drawing onto the screen graphicsDevice.SetRenderTarget(0, null); // draw the old, non-lit, scene DrawScene(); // multiply the light buffer texture with the scene spriteBatch.Begin(SpriteBlendMode.Additive, SpriteSortMode.Immediate, SaveStateMode.None); graphicsDevice.RenderState.SourceBlend = Blend.Zero; graphicsDevice.RenderState.DestinationBlend = Blend.SourceColor; spriteBatch.Draw(lightBuffer.GetTexture(), new Rectangle(0, 0, screenWidth, screenHeight), Color.White); spriteBatch.End(); </code></pre>
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    1. USTom Gillen
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    1. COPerfect answer, thank you!
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