Fixed LUT rendering

demos/optical_bench/src/ray_pass.cpp

@@ -313,7 +313,8 @@ void RayPass::createTarget() {
   auto color = lut_img->GetPixelColor({0, 0});
   for (auto i = 0u; i < 256u; i++) {
     color = lut_img->GetPixelColor({i, 0});
-    LUT[i] = glm::vec3(color[0], color[1], color[2]);
+    LUT[i] = glm::vec3((float)color[0] / 255.0f, (float)color[1] / 255.0f,
+                       (float)color[2] / 255.0f);
   }
 
   // Material
@@ -411,7 +412,7 @@ void RayPass::copyAndScaleTargetData() {
       curr_val = buffer_data[i] / max;
 
       // LUT
-      curr_color = &LUT[(int)(255 * curr_val)];
+      curr_color = &LUT[(int)(255.0f * curr_val)];
 
       // color highest values red
       textureDataBuffer[i * 3] = curr_color->x;